Contacted Palomino service concerning the different weight stickers. The representative couldn't explain the reason for the difference, except maybe printer error.
Asked my local RV service center, Pocono RV in Wind Gap PA., and they stated that this happens a few times and I should get my camper weighed.
After performing online research, I believe that the door weight sticker is the most accurate. According to RVGuide.com, the GVR of my camper should be 8,070 lbs with only 1,037 lbs of cargo. 2011 Palomino Puma 253-FBS Trailer : Reviews, Prices and Specs : RV Guide