Editing Title on a Thread or post

[xb4b1x]

I been doing forums quite a long time. This is a weird one though maybe it's easy i dunno. I have the option to edit my thread and or post when i misspell or write the wrong topic. I change it but it doesn't ever show up in the actual title. I clear my temporary internet files and everything still the same topic when i save it after editing. Is there a setting I'm missing? Am i doing something wrong? This is on my forum by the way. Thanks for any help anyone can give i appreciate it.