Accounts Aren't Coming Up Merged That Should Be Merged

SocialThing is not showing a friends account properly in the Lifestream. My wife has a SocialThing account, and recently started using Delicious for bookmarking. However we set up the friendship in Delicious before she added her Delicious account to SocialThing, as a result some of her bookmarks came through as a separate item in SocialThing which lists only a single Delicious account.

She has now added delicious to her SocialThing account, and if I look at that it correctly lists that she has a Delicious account, however if I look at a Delicious update then this appears to be a record from a separate account with only her Delicious account referenced. I can neither rename that, nor merge this in with her main account.