did you stop searching with your chaos fleet before returning to the main menu?
have noticed that when exiting the docks and looking at the main menu or other things (noticed when looking at the ingame faq) you can still enter matches if you didnt stop searching before exiting
havnt had it when switching fleets so not sure if its the same thing
but could be that it still searches but does recognize that the fleet has changed
had this happen today but was searching in ranked
just returned from checking the leaderboard and then this happened
match played out as normal, after first round he abandoned
think i beat a persistent fleet in ranked???
dont know if he abandoned or if he was searching persistent and didnt get the option for the second match