"Where am I sitting then?"
Translation:Càit a bheil mi a' suidhe ma-thà?
càite a… is an older spelling, càit a… is a newer one that leaves out an unpronounced vowels. They are both the exact same words. The course initially used the older càite a… but is switching to càit a… so that’s what you’ll see in newly added sentences. Both should be accepted (if one is not, report it).