Your problem is twofold.
First, the patch mod I made only fixes half the problems as I tested it on the improved map mod and not this one, and its issues go much further. To fix the problem with the square, go download my https://danetello.itch.io/foxhole-better-hex-colours-mod. If you don't like how it changes the colors, then it's too bad, unfortunately, but it will fix the inventory UI bug.
Second, the zoomed-in nature of the map is due to you using the HD version of the map mod. The map mod, unfortunately, does not compensate for the larger images by zooming you out, so to fix this, you will need to use my https://danetello.itch.io/foxhole-red-icons-mod, I specifically adjusted the zoom level with that mod to compensate for the HD map mods. If you don't like how it changes the colors, then it's too bad, unfortunately, but it will fix the zoomed-in map.
I hope this helps and sorry that my map mod patch mod did not completely fix this map mod.