This happens to me all the time and it's the most frustrating and annoying thing ever! It might not be as bad if I just had to change the IVs to what I want them to be just once while I set my team up and then not look at it again, but for some unknown, God forsaken reason, if I click onto a different 'mon on my team or go back to my overall team list and then go back into my team building screen, lo and behold, the IVs got reset back to zero like Smogon is trying to play a dirty prank on me or something. And so I'm paranoid about it now cuz I can't trust it'll even stay as what I set it to!
A super simple solution would be something like a toggle.. Why can't there be a toggle to decide between if we want it to default to what Smogon thinks is the best IV spread and just a simple 6 perfect IVs???
I mean, don't even get me started on how awful Smogon's suggestions can be for things like the Pokemon's moves. I have to shake my head every time I go to add Icy Wind or Snarl or Trick Room, it's always in the "usually useless" category ... Why is there even a split of the move pool to begin with?!?! But I digress... Sorry, rant's over. I'm sure it'll never change. I just needed to get that off my chest...