Ghost Transaction

When I update on-line transactions one of my Vanguard investement accounts has the little blue dot next to it, but when I open the account register there are no new transactions.
If I look on-line for that account, it shows a transaction in there, but it does not do anything with it.   It appears to be a transaction that is already in the register. 
I'd like to delete that transaction as the account is correct when I manually check it, but I see no way to do so.
I have tried all the various repair/validates to no avail.
Suggestions?