back again lol, I haven't seen any overgrown fish since the update you mentioned, but the sell all buttons do seem to have an issue still. if there's no locked fish, it works perfectly - the sell all button sells all, and the sell adults button will sell all the adults and only the adults.
however, when there's locked fish in the pond, it seems to stop selling the fish when it hits one that's locked, instead of continuing checking the list of fish? if that makes sense? as in if the fish were in a list like this:
unlocked 1
unlocked 2
unlocked 3
locked 1
unlocked 4
unlocked 5
locked 2
locked 3
unlocked 6
it will sell the first three just fine, but not the other unlocked ones. if, however, i go through and unlock fish and try again, and happen to unlock "locked 1", it will then sell that fish, as well as unlocked 4 and 5. "unlocked 6" doesn't get sold though unless I unlock the remaining locked fish. I'm not sure if it's exiting a loop instead of just incrementing or something.
again though, I'm a huge fan and I'm looking forward to a full release !