Sale topic is asking for offer without price to check user's interest for my multiple domains
but the auction topic was with price details and separate for each domain with starting bid,bin and other details
You can't say its double posting, 1 topic about my multiple domains asking for offers while other one where I am auctioning one of my domains.
If the things are as you said, then you do have a good point, but he found it needed to move both of your threads to the trashcan. If you want to know his exact reason/motive for doing so, just PM him and you'll find out what you did 'wrong'. Only he can give you the proper answer.
Link to directly send him a PM;
https://bitcointalk.org/index.php?action=pm;sa=send;u=553678