SH3Cmdr uses the officer icons located in \SilentHunterIII\data\Menu\Data\ofaces. Your problem is caused by installing an officer icon pack that contains officer icons that are not in the same format as the stock SH3 officer icons. Unfortunately, SH3Cmdr cannot cater for every different modder's "unique" take on how to create an image file.
So, either find the mod that changes the officer icons and disable it, or, if you want to keep the officer icons in your game, accept it. Alternatively, I suppose you could go back to the modder and get them to fix them up (as has been done with other officer icon packs).
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