FS sort prefix...

So with all the locked threads in FS section just tried to sort as only FS but that dont work as no one used FS so every thread that came up was locked as not changed to sold.
I have not listed anything yet here but shouldn't prefix be required?
2nd can locked threads be switched to something other than FS or something to make sort work?
NBD just thought...expect im going to be here a lot now back into working on car so just posting this as maybe way to improve FS section.

 

We lock for age because posters don't update if sold. Will be interesting to see when we migrate to the new forum software if there are enhancements there.