Going back through my data this evening and it looks like I made a bit of an error. I noticed some eggy stars on the left hand side of the image that I claimed was 6hrs of exposure time, so I manually checked all the frames and none had eggy stars so figured the problem was in DSS. I reran the images through DSS in the exact same order only to notice that the output file was only 3hrs of exposure!!! Long story short, I made a few settings changes and got DSS to stack all the subs,