There is a connection between an audit on US and UA.
At the start of this year I took a trip on United - half way through the itinerary altered the FF from UA to US as I hadn't been using UA much the previous year and wanted to maintain status on US.
Didn't think too much of it at the time, but apparently some parts of the journey appeared on both accounts.
So one assumes they are checking for other errors that may have been made...
US have been very very helpful and have said it will take 10 days to sort.
UA say they have written to me and should follow the advice in the letter once I receive it but would not go into details over the phone.
I think the whole situation is extreme to say the least when we are talking about 1,500 miles in total.
But nothing to do with selling stuff on Ebay!!