If anyone else is having problems with bookmarking their my ebay page you might as well give up trying to fix it. I emailed ebay about the problem and here's their response:
"...Thank you for writing eBay in regard to bookmarking your My eBay pages. We appreciate the time you have taken to write, and I will be happy to help.
Because of security concerns, we have been moving away from the ability to view My eBay pages without actually being signed into a certain account for a while now. With the new My eBay format, the ability to view My eBay pages for a User ID, without actually being signed into the account, has been completely removed.
It is no longer possible to go to My eBay pages directly through a bookmark, unless you have already signed into the account you wish to view. If you use a bookmark, it will take you to a specific My eBay page for the account for which you are currently signed in on your computer. If you are not signed into any account, then you will first be taken to a sign in page..."
Some of you have said that bookmarking still works but it's just a refreshing issue. Hit f5 in your bookmarked page and you will be take to ebay's login page.
Thanks for the help though 🙂