After deleting a save it will be invisible in "my saves", but can be accessed if you go into a "deleted saves" tab, which it stays in for 20 days, it will automatically delete itself after this time, and cannot be accessed by typing its save id. It can be restored by right clicking the icon and selecting "restore" or by resaving it. The deleted saves tab only appears if there are any saves in it.

This makes it possible to recover saves that were accidentally deleted, or saves that were deleted by someone else using your account.

Also, is the save history only meant to be one page long? Increasing the save history size would prevent a possible workaround for someone who wants to delete your saves.