It will go away eventually, once you clicked not a match enough times. 

When there are a lot of transactions with the same amount, it can take many clicks.

$75.00 fuel and $0.99 Itunes are the constant headache for me.  We route all of ours to a clearinghouse account with rules for further processing.  We use account 800000.  We have a few that we automatically route to utilieis and phone accounts, but most go to 800000 then are assigned to the proper COG sold account from there.