I've just had a look through this myself, and it appears that a bug has crept in to this section of the code. I think it may have occurred when I changed some of the development tools that I use for MixEmergency. I've managed to fix this, and it'll be fixed in the next release. If you've set the position of the text just once before you started your recording, then you may be able to salvage it (if you aren't afraid to use a hex editor).
