Well, it seems your links to the screenshots were removed, so I've not been able to see them. At a guess though, there are conflicts between the mods, in other words, both mods want to change the same files. Depending on load order, the game probably chooses a couple of my files and a couple of their files to use. There is no easy fix. However, you could try a different mod of mine instead of the Stellaris UI mod.
Another Stellaris Font

Oh, i love you m8!