i have several spirits together both light and dark. they respect each others presence and space. the thing i learn is to let the entity that you are adopting know your other companions even if they do know. and vice aversa with the spirits that you have. of course they wont hang around. they will leave if necessary to avoid conflict. but this doesn't mean they wont come back to visit you. i learn they will come back if you call to them. and asked the others not to interfere.
it is matter of respecting a spirit's wishes. and respecting your other spirits by informing them of your plans and let them do whatever they wish. then they will be more willing to help you even if they are far away.