Unable to make any changes / updates to the theme..

I have made several attempts at making simple edits to this theme. I make a round of changes and then refresh the site, the changes work, wait a few minutes sometimes and the changes revert to exactly how it was.

I have attempted using a different framework to build the theme. It still did the same thing. I attempted to rename the theme folder to default but it still did the same thing. I am currently using 2.8.2 but I thought I would just try to ask here for some assistance before I attempted to upgrade.

https://www.sisterscupcakes.com/wp/ <– is the site. Any ideas?

You’ve always been helpful in the past. Thanks in advance.