Why is this stuck??

A buyer has bought several things from me and has requested a postage total, which of course is perfectly normal.

 

I have sent the buyer an invoice 3 times showing the combined post, yet in my Sold page, it is still constantly saying in red Buyer requested total. Why is this not disappearing from my Sold page if I have sent the buyer the correct invoice 3 times.

 

Is it a bug in the Ebay system??