There seems to be a bug with the EXP requirement to reach Level 62.
https://imgur.com/yT1aPSTNote that Cloud just reached level 66, and needs just over 80k EXP to get to 67. Nanaki recently reached level 60, which seems to need about 60k EXP to get to 61. But Barret recently reached 61, and needs a whopping 300k EXP to get to 62.
What's going on, here? I noticed it when Cloud got to 61, as well, but didn't think to screenshot it.
EDIT: Another bug: The Blaster attack from Cuahls in Gaea's Cliff appears to be a "remove the character from battle" attack, but it doesn't visibly push them out. They sit there with their ATB bars not advancing, but otherwise appearing to be OK. They're definitely not there, though, since you can't give them items (if you target them with one, the item gets thrown to a character who is actually still there), and once the magic cat Blasters all 3 of your party, it's Game Over.
EDIT 2: Here's a weird one. Talking to the "dry goods vendor" in the Wirlwind Maze generates an MP Turbo materia in your inventory every time you shop with him. I've got like 6 of them now, after trying to figure out why a fresh one appeared at the end my list when I went to sell him my extra materia, despite Nanaki having been using that materia since I found it in Great Glacier.