On my iPad1 some emails appear with a number 2 beside them. Touching on these brings up two emails, one the same as the original and one above it just one line. Deleting the original leaves the following apparent email "(No Sender) (No Sender). This message has no sender. The date is shown as 1/01/70. I cannot delete this as the delete bin is not available (shown faded). I now have quite a few of these "rogue" emails and would appreciate hearing from anyone who can advise why they occur and how to delete them.