This has only been a problem since yesterday's update. I go to the Skills Trainer and I can't get new abilities for my officers. I click on the appropriate career path and rank and, when I hover over the correct officer in that career path and rank, it gives me some crap about how the person is ineligible to receive that skill (or something to that effect.) I've never had this problem. I have more than enough Starfleet Merits, so I don't know what the problem is. They're all trained up in their previous ranks, so I know that can't be an issue (besides, it never has been in the past.) It's really annoying because I have Lt. and Lt. Cdr. officers who are stuck with abilities in their current ranks that I don't want them to have.