I know it's not a different account. I ordered Europa Universialis III Complete in a single order and for one price. I received three games and could see them and install them in Impulse:
1) Europa Universialis III
2) Europa Universialis III: In Noninae
3) Europa Universialis III: Napoleon's Ambition
Now I have just In Nominae showing in Impulse. The other two simply disappeared.
If I ask Impulse to email me my registration numbers, I get the numbers for all three, but I do not see in my game list and thus am not able to install, for example, Napoleon's Ambition.
This is just one example I also have other missing games.