I'm having the same issue. I was Biochem, then Cybertech, but returned to Biochem. Now every reverse engineering schematic I learn disappears from my skill list. Very frustrating considering the time and cost.
Update - I had already submitted a ticket, but I've yet to see a reply.
I've sent a ticket about this more than a week ago, but it's already closed and it happened without any kind of help or response from them. I hope you will have more luck with your own, but I wouldn't hold my hopes up. CS is this game is appauling.