I am on 1.2.4
I tried the development version, and had some weird things happen. When I was logged in , I got 2 versions of the form on my pages, one right after the other. (If I then logged out, I saw the correct number of forms on the pages.) It did not matter what browser I used, and I tried clearing cookies and cache several times to eliminate any cache issues.
I did try to fill one out and it worked, but the emails sent were still showing the error in the #_TOTALPRICExx as mentioned before.
As soon as I replaced the dev version, the number of forms on pages (logged in or out) was 1.
I have removed the dev version for now and replaced the one I had originally installed.