I have been having the same problem as you MemphisBelle. I have deleted all my stuff yesterday and gonna re-install soon. But before i deleted i was thinking my issue might be with the maplegend.png? i opened it and saw it had the old texture names from Arma1 written in there.
I couldnt find a new one, so i un-installed, gonna start over, and hopefully by that time an updated sample map or something will be out that i can compare to will be out. This way i can figure out what's different and what i didn't do correctly.
I also never played arma1, so this is all new to me and i wasnt sure how relevant the maplegend.png is or how to change it correctly, since most if not all the tutorials were written for Arma1.