I just tested the trainer it works fine.
for instance, with mercenary hiring, you turn the option on, click on the army to hire mercenaries, select the units you want to hire, then click the HIRE ALL MERCENARIES button. it hires them. you can then click on the army again and see that the units are there again to be rehired.
these work fine here for me..
best,
cal
I apologize for not being clearer but it is not the mercenary option that is malfunctioning but rather "Numpad 3 Maximum recruits" which effects garrison recruitment. As you stated the mercenary option along with the other options are working as intended, just seems it is only command 3 that is out of order for now.