Oh, and I just discovered that my explanation was wrong. The board software resizes things but I also use a "shortcut" to create a link to pictures hosted here. Having it not resized has nothing to do with the picture being hosted here but does have to do with not having a proper link to use with the picture tags.
So maybe I will try to manually name them with the whole link (it is tedious and I was trying to save time and brain power). It is disappointing to find a flaw in my system!