PD problem

[esd29a]

Hello. I have been working on a mod nation. Everything seems to work, except PD. I have defined 4 units for it but when I test it in game only 2 unit types show up.

Here is the code:

#defcom1 2844
#defcom2 2846
#defunit1 29
#defunit1b 2839
#defunit2 2838
#defunit2b 2841
#defmult1 20
#defmult1b 20
#defmult2 10
#defmult2b 10

29 and 2838 are the unit types that do appear. Any idea what I am doing wrong?