No, this is not just you Jerry, this is indeed happening, and only on that login entries for some reason. Hard to delete them. A solution - move your mouse somewhere within that entry field until the arrow down appears. Than right-click, also somewhere within that filed, NOT on the arrow itself, so the contextual menu appears. While the menu is still on the screen, you can now click on that damn arrow and it will show "Delete" link. I am on GC though, not sure if it works in FF.
Guys, I want to kindly ask you not to turn Help forum into chatroom. People are reading this forum in hope to get answers to their questions, this is sort of our FAQ section, please don't trash it. And please ask ONE question per topic, don't pile different questions in the same topic.