Well the problem lies in the fact that reservations have no point if you go for a first come first serve basis.If your worried about people creating sheets before the thread is put up, then I don't think putting up a sheet was the best idea since it is conducive in causing others to cement their spots in a RP with characters immediately, hence why the sheet should be a final product most of the time. Unless you specified the sheet you provided was a preliminary in which case people are jumping the gun.
First of all, I did comment that the CS I posted was merely a 'preview'. Secondly, you are right; it wasn't such a great idea, now that I've thought about it, since people are clearly easily confused, because thirdly, it should be common sense that making a CS based on an interest check is a rather stupid idea.
But hey, it's no skin off my nose if you guys want to create a CS before you know what I have planned for the actual RP. You'd be the ones missing out on the context of the official story, centering your characters round a half-built universe.
By the way, how
are you going to summon your fictional Servants? Didn't figure out that part of the RP yet, did you? I mean, it's not like your Masters could conjure an imaginary catalyst out of nowhere. And if the logic behind said catalyst, which might or might not be important to the
Backstory of your Master, hasn't been explained yet, how are you going to create your Master CS again?
And that's just one of the many details in the unfinished plot that might or might not be relevant to the creation of your CS.