First, there wasn't any need to repurchase anything "just" because you had a new PC, since the Self-Help site linked on the FAQ page of this site would have helped you to BOTH retrieve lost keys, but also to DEACTIVATE a previously used PC, so you could use your keys on a new one.
In any case, if you are missing passengers and you have activated GSX L2, the most likely cause it's because the scenery you are using doesn't have a SODE jetway.
