eBay has changed the Purchase History page -- the default is no longer the last sixty days, but the last three years.
Some older, previously hidden items are apparently no longer hidden, and there is no option to hide old transactions, only newer ones.
One possible workaround is to bookmark a page that shows recent transactions, hide the transactions you want to hide, and then use the bookmark in place of eBay's link unless or until eBay fixes the old link.
