@igohigh : to start with last sentence of your last post resolution = DPI is NOT a absolute terminus. Fullstop. Resolution is a relation of given pixel count and used output format. So as stated in your very first post you have advised Poser to make 300 DPI for 11 x 8.5 inch paper and Poser did so. But now looking on the image Photoshop is telling you 72 DPI at 45.828 x 35.412 inches (your post). You can calculate with pocket calculator as I state posts in front or let it do by Photoshop by changing the DPI without resample. The pixel size stays the same and you get the 11 x 8.5 inches. Thats fact both is the same in result.

And now to the 28.350 DPI ... some posts ago you have shown dialogs from Photoshop (correct) and PaintShopPro. Have a look to that and is there standing in the left column overtitled original this DPI count. = resolution 28.350 and in the right column overtitled New 111.096 and 85.848. These are inputable fields. May be this comes out cause you have activated resampling. Also like in Photoshop resampling have to be disabled. Have a look for your stuff.

The DPI comes not from the saved file. The programs are checking this by the given pixel count (bytes) in file and their default output settings in papersize. As also the cameras do so depending on the technical possibilities of their chipset, in former times the quality uf the used film depending on grainyness, light factor, etc. For example a 100 or 200 ASA film was good for daylight and sun, on christmas market you needed better than 400 ASA. My Canon digital can go up to more than 4000 ASA. No formerly could buy such a expensive material. Thats are technical facts. But never the less the canon is writing into EXIF data 72 DPI with a adequate output size which is not known in that moment.

Ok and now I'm out of this discussion cause all is said so far.