When I get a private message and read it then delete it, I keep getting a reminder that I still have a private message, do I want to read it. If I say yes, it says "no message" yet, will alert me again that there is a message waiting my attention. Apparently, when the delete choice is made, it doesn't clear the software.

That will happen sometimes if you hit the "Back" button. Next time, try clicking on "My Forums" after deleting the message