Just a minor annoyance I figured might be worthwhile reporting.
When finishing a level in a custom campaign, you end up in skirmish setup afterwards. So you have to click "Back"->"Yes"->"Campaigns"->"Custom Campaign"->Select the campaign you were playing, in order to return to the correct spot.
Returning to Custom/User Campaigns with the current campaign selected in drop-down, and perhaps the next level pre-selected tho that might not be possible without larger changes(?).
Customer support service by UserEcho