Activation Popup in game?

[Scif]

I am not sure this is a problem or just something that happens, but tonight after playing all day i was ending a mission and as i quit i got dropped out to desktop with a prompt to enter my registration code, in fact the registration code was already filled in.

 

I wasnt sure what to do, so i followed on to next stage and was told this code has already been used, and do i want to continue? now i have already used this once when installing the game, so i just accepted this and went to the next stage when i was informed i only have 7 activations left.

 

I just want to know if this is correct, or some issue.

 

Running Vista Ultimate 64 4gb Ram with ATI 4870.

 

can i please get some clairity on this issue if possible.

 

Cheers.