In addition, the character sheet's layout show not be taken into consideration to enforce something as a rule. No idea who came up with this idea, but I recall similar conversation in Discord.
For example the official charsheet has 12 slots for talent. Does this mean that you are limited to 12 talents only? No. It is just how the layout is done, you don't have infinite space.
There is 4 PCs in the relationship tab, does this mean that you can have a game only with 4 players?
The character sheet layout does not determine rules, no, but it's a decent precedent where no other exists. The layout wasn't determined randomly, space was assigned as was thought would be reasonably needed in the vision of the game by its creators. So sure, there's no rule saying you should only have 12 talents but goodness you're talking about 12 talents, that's a heap for something that should represent specialization. That campaign should probably be ended and maybe someone has given out xp a little too generously.
Also worth saying that as far as official character sheets go, this one is a beauty and very functional, well done Fria Ligan.
RE:OP xp actually isn't something I'd cap. If someone wants to haul around a ton of unspent xp it really doesn't harm anything especially if you keep the leash on advancement (it takes time, wits rolls, justification - RAW for skills but I do with talents too). I guess if someone wanted to improve a magic talent to 3 without training they'd need what, 36? So 25 maybe shouldn't be a hard cap.