Incorrect shells being fired for 30mm on Do 335 b-2

I am using the armored target belt during ground rb, but when I fire at tanks they do no damage and I get mostly shell shattered results. When I look at the hit analysis on the match replay it says all my hits are 30mm HEI-T instead of 30mm HVAP-T. I have double checked that I have the armored targets belt and not air targets belt checked.