It seems the sell order is still outstanding. I think the " Withdraw 54096981335 satoshi amount of asset" just means the order was placed.
A similar thing happened to me a while ago, with some NOTES seemingly gone from the wallet after I placed an order. Actually, the notes were not gone; they were just not displaying properly. IIRC, what I did to correct this was to start a brand new account and wallet, and let it sync (this can take a long while). Then, in the BitShares folder for the new wallet, I deleted the "wallet" subfolder and replaced it with the "wallet" subfolder from an earlier backup. After syncing and scanning, the missing NOTES had reappeared. Be sure to backup the BitShares folder to one or more safe places before doing any of this. Also, keep earlier backups if you have them...