Author's Note:
In my mind, the Hogwarts RPG is a cross between the Elder Scrolls series and Chrono Trigger.
The goblins' bad programming is the equivalent of the NPCs with one line each in the old Nintendo Entertainment System RPGs. "Welcome to Corneria!"

The fact that you guys are telling me "the game was programmed poorly", and not "the goblins were written poorly" tells me that that chapter conveyed exactly what I wanted it to. ;)

Hagrid was waiting for Harry outside of Gringotts.

"So you got yer money!" Hagrid said, slapping Harry on the back. "Good job, Harry! Next stop is Ollivander's! Can't be castin' spells without yer wand, now can ya?"

"Aren't you coming with me?" Harry asked.

Hagrid laughed. "No, no," he said. "Best for you to explore Diagon Alley on your own."

The first time Harry had gone to Diagon Alley, Hagrid had taken him everywhere. This time around, it seemed that Hagrid was leaving him to his own devices. Harry didn't exactly mind, but it was another oddity that he couldn't explain.

Harry took off down the bustling streets, heading to Ollivander's fine wands.

Harry stepped inside, looking at the boxes that took up all the shelf- and wall-space around the room. "Ah, Mister Potter," a voice said. "I thought I'd be seeing you soon."

Behind the counter stood old man Ollivander. In front of him, lying on the counter, were three wands that appeared identical. Harry stepped up to the counter, halfway expecting the blue screen to appear again. To his mild surprise, nothing happened.

"I'm here to pick up my wand," Harry said. "Holly wood with a phoenix feather core. Although if you have one made with elder wood and a thestral feather, I'll take that one as well."

Mr. Ollivander replied "It's not the wizard that chooses the wand, but the wand that chooses the wizard."

"Yes," Harry said, "and I'm positive that the wand that chooses me will be holly and phoenix feather."

"We shall see," said Mr. Ollivander. "Pick up any of the three wands in front of you and give it a swish."

Harry examined the three wands. None of them looked any different from the others. He picked up the first one and gave it a swish. Nothing happened.

"Place it down and try another," Mr. Ollivander instructed.

Harry put the wand down and picked up the second one. Again, nothing happened.

"Ah, it must be the third one, then." Mr. Ollivander said.

"I'm telling you, it's not going to be any of these," Harry said.

"Regardless, pick up the third wand and give it a swish."

Harry sighed and did so, being utterly unsurprised when nothing happened.

"Curious", Mr. Ollivander said. "One of those three should have given you a reaction. Perhaps if we tried... yes, why not. Here, try this one."
Mr. Ollivander held out an unfamiliar pale brown wand to Harry. Harry took it and felt a cool sensation spread across his arm. Harry moved his arm in an arc through the air and silver sparks shot out of the tip of the wand.

Quest complete: Acquire wand from Mr. Ollivander
Magic system unlocked!

Harry squawked in outrage.
"Hey!" he shouted at Mr. Ollivander. "This isn't my wand! My wand is made from holly and phoenix feather!"

"Oh, but I'm afraid it is" Mr. Ollivander responded. "That wand chose you, and the magic inside you responded. I'm sorry it isn't what you were expecting, but this wand is remarkable nonetheless."

"I don't care how remarkable it is, it isn't mine!"

"Twelve and a half inches," Mr. Ollivander continued, as if he hadn't heard Harry. "Pine, with a core made from the hair of a japanese nature spirit. But then, I suppose we shouldn't be surprised given your ancestry."

Harry was going to continue to rant when Mr. Ollivander's words hit him. "What do you mean, 'my ancestry'?" he asked.

"I thought you knew. Your father was a carrier of the Imperial Bloodline. That's how he defeated He-Who-Must-Not-Be-Named on the night of the attack on your family."

Harry was stunned. More changes to what he thought he knew. Even Harry's history had changed, though he had no idea how or why.

"After the Dark One killed your mother," Mr. Ollivander continued, "your father tapped into great and terrible powers to save you. Unfortunately, his body could not handle the strain and he passed away shortly thereafter."

"He... died protecting me? And he killed Voldemort in the process?"

Mr. Ollivander nodded.

Harry took a minute to digest what he had been told. His father was a hero.
Harry realized he was crying. He rubbed his eyes dry with his shirt.

Turning away from Mr. Ollivander, Harry waved his new wand around. He did this partly to get a feel for the wand, and partly as a distraction from his uncomfortable emotions. Harry pointed the wand at one of the boxes and...

um...

Harry put down the wand.
He knew what spell he wanted. The spell's name was wingardium leviosa. It was a levitation spell, designed to lift an object into the air.
So why couldn't Harry remember how to cast it?

Harry remembered learning the spell in his first year at Hogwarts. He remembered Hermione getting it perfectly right on the first try and Ron getting upset by that. He remembered Ron casting it on a troll's club, indirectly knocking the troll out. But for some reason, Harry couldn't remember the spell itself.

Harry racked his brains to remember how to cast the spell, but after a long period of concentration Harry eventually had to accept that it was beyond him for the moment.
Harry was concerned by this, but his concern eventually gave way to boredom and Harry left the store.