Ah, hmm yeah I can see how that can happen. The soldier rescue maps are basically copied variants of the abduction maps so while it is technically a different map, it ends up looking like the same map spawned. Will bring this up with the rest of the team!
EDIT: Nvm, this is another case of bad randomisation, basically the maps get picked until all maps in a set are chosen, then it is reset. So in this case, once the 4 abduction maps were chosen, the next one has a 1/4 chance of repeating. This will be fixed in the future once we've gotten a handle on the more severe issues in the game.