When you signed up did it show that it was Tault as well as MMOViper? we just recently implemented that is why I ask. If you signed up and it did say that, send a PM to PitViper so he can check it for you. If you did not see that, you will need to cancel your sub, and re-sub to get both.
If you bought a lifetime access to a bot on MMOViper then your access will remain the same. You will have access to that bot.
For instance if you bought a lifetime access to LOTRO bot you will have access to LOTRO bot and the upcoming LOTRO Radar, but you do not have access to TU or any other bot with your LOTRO account.