I think I know how to edit.

Try it on one of your threads.. It actually doesn't change the title.. It only changes the upper line.....

Look at the top of this thread and you will see the actual title has no period, but the upper line which is the repeat title in the first line of the thread has a period...

But thanks for trying to help me.

I am not a MOD in this section , so I can't change my title... I did what you are meant to do and made a new thread and deleted the old one.