Focal Length changes in C1...

I've noticed on a couple different occasions now where the focal length will change in C1, as well as distortion correction, in between shots even though I haven't touched anything on the camera or computer. It doesn't physically change, other than a slight shift of frame and the light output of my lights is slightly higher (again I haven't touched the settings on my light). It'll do this for a several exposures and then go back to normal, any ideas? Here's what I'm working with...

Capture One Pro 9.1.2
Canon 5D MKIII w/ Canon 24-70mm 2.8 - tethered with Tether Tools USB cable

Here's a screenshot showing the jump from 58mm to 70mm even though the camera and lens haven't budged, you can also see the slight exposure difference...

http://img.photobucket.com/albums/v645/drumsnotjames/Images/Screen%20Shot%202016-08-26%20at%2012.23.45%20PM_zps5vfw1tpk.png