With regards to "gouls" / undead followers

is there any way to stop the minion from summoning all of the time?
I only want him out when i summon him and it seems like every time i go in or out of a doorway, mount up, or do pretty well anything it summons the minion/undead.
Im a main hunter and when i dismiss my pet he stays away until summoned but with minions on the deathknight its like every chance it gets it summons its self, i can manually dismiss it/them but seems like no time at all theyre back.
anyone? any insight?