Is that a bug, or is it that Advanced Biochem is just not offered?
It does exist as I have it. First you have to buy RotHC, which you seem you have done or the Adv Cyber won't be available to you. Try again at the Fleet Crew skills vendor, it should be at the top of the list. If it isn't there, try creating 1 more level 6 item and then go back to the vendor.