Weird blips in displayed position while pre-processing geo referenced images of a flight using dual GPS

Not really sure how to describe this error.

When using two GPS’, I get position that looks like this in the geo referenced window:

When i disable the second GPS, This is what it looks like:

This problem also goes away when “CAM Message” is disabled and “trigger message” is enabled, as shown:

For the time being, i’ve disabled the second GPS, but i’d like to be using a second GPS as well. What do you guys think?