GRLevel3 does upload the entire set of sequence images for each view you selected. Your br1 image is 198770, so 1.9MB per upload cycle (every 10 minutes).
Thats about 274MB/day per image set. To get to 3GB/day, there must be other views open (beside the br1 view) in the GRLevel3 that is submitting in order for those extra sequences to cause that much traffic.