Experiencing issues with editing signature

In User CP I can get into the edit signature app yet cannot click on anything to change it.

I cannot add a direct link to images even if within pixel size

There seems to be some portion of coding in the signature that doesnt even show on regulr posts.

I cant add text or delete it ... I can click the insert link to add a hyperlink yet cant delete it once its in nor save it or preview it ...

The app just seems rather nerfed, can I get some help with this please

Cheers --m00se