I had this happen to me in the past as well. I bug reported it and sent a report to a GM. Neither wrote back with any helpful information (just the standard cut-and-paste replies); the reply from the GM almost sounded like it was 'working as intended' and to 'check the forums', which I did to no avail.
I would bug report and send a report to a GM as well, but you will probably get no helpful response on this issue. I tried everything to solve the problem (question: if you try to train a commander level ground skill do you get some kind of "null" line at the trainer? That's what I would get).
I would wait to see what kind of response you get, but if you have the exact same problem I had, you'll most likely be looking at having to replace the BO as I did.
Good luck to you, and if you actually find a solution, please post back here, I'd love to know what you did!