tenuki__: I also faced the issue mentioned in the previous comment.
caranthir: Yeah, that is (or was, if already fixed) a known bug stemming from BesoGo's functionality, because the program merges variations at the point where they transpose.
heron: After playing an incorrect move, I clicked some more moves for both players and the problem declared me correct (I guess because I had transposed to the correct position). Seems like a bug in the site.
Yeah, that is (or was, if already fixed) a known bug stemming from BesoGo's functionality, because the program merges variations at the point where they transpose.