Some of the negs had been improperly fixed, some had photoflo residue. The crud on some strips transferred onto adjacent strips. . . .
They are not stuck together, or "ruined" but I would have been happier if they had been in their own sleeves.
Man, that's not a sleeve problem, that's a hygiene problem. The solution to your spoons sticking together in the drawer isn't to lay them next to each other instead of stacking them.