Interesting. That would mean there's more than 1 entry, and they're all 320x240. But I goofed in the new one and was reading the same thing as before twice, so download it again. Sorry about that. If that doesn't work, I'll just insert some common formats. It's just odd that it only reports 320x240.
The low CPU feature just has some optimizations to keep CPU usage down. I've removed the option now (and added GPS enable per camara) since it doesn't seem have compatibiliy issues with anything.