Hmm, this is tricky.
With custom roster sets and quick-starts, you'll probably need to speak to the people who created those rosters and quick-start games. If the in-game options (fictional, standard, historical) are working for you, I'm not sure there's much we can do to help...
I'd suggest bringing this up in the threads related to those custom sets you've been using . . . at least to start.
What sorts of errors are you getting?