Can you attach a saved game file here? Save it just before combat, and make sure you describe the behaviour in detail (ie. which battle is screwing up, which round, what the rolls were, what you think they should have been, etc.)
In the SZ, your ftrs can also land on an allied carrier that has vacancies.
Carriers have room for 2 ftrs.
Your can move a carrier into combat along side your ftrs in a SZ. Assuming your units survive, 2 of your ftrs can land in that same SZ on the battling carrier.