Problem with having to rename theme eveytime

Hey I’m having problems with a theme “busiprof” for my site howekellerhunter.com. Every time I edit the website from the dashboard the admin log-in will not re-appear. I fix the problem by renaming the theme file at the host, but then I have to change all the image links, etc… every time I make a change and then it just locks up again after I’m finished editing.

Any ideas for a more permanent solution?

Thanks,
Tim