First, I'd suggest you go into the actual file for any T+T weapons you are missing, and see if all the eels are there (there are usually scripts with the name of the gun in the title). If you can't find the scripts of those weapons, then redownload from a different link. If you could find the weapon files, then it might be an old T+T file without an update fix.
Are you getting then off of RTB? If not, then delete all T+T weapons, then download from RTB, because those guns are all there.