Recruting elites from captured castles: bug?

[number6]

I'm new to Dom2 and playing man have captured Ulm's castle. The special sites show with elite troops (the Keep of Ulm "can recruit Guardian here" and the Black Temple "can recruit Black Templar here") but under "recruit units" there are no Guardians or Black Templars (or any Ulmish unit for that matter). Instead there are barbarians and light cavalry -- are those the remnants of the now dis-heartened Guardians and Templars? Or is there some magic keystroke to be able to recruit the ex-enemy's special units as shown on the special sites?

[archaeolept]

you can't recruit the vast majority of capital troops (other than hydra hatchlings in pythium and seers/wolfherds in BF ulm (which is a bug)), but the indy troops that would have been there otherwise can be recruited.