Garrisons Blocked from moving beyond a point:

Today i was doing a couple of advents ( Surprise Attack & Gunpowder), and noticed that when i had been sent to my landing zone in SA, i couldn't move my garrisons beyond a point where one of my garrisons blocked a passage.. even though the next area was opened... this also happened in the other one i was doing. This hasn't happened before "to my knowledge" and i noticed that my garrisons were parylized until i found a way to move one to make a space to move the other... I foresee a problem with this, if it is supposed to be like this... in that you only have so many places and unfortunately i've had to send my garrison back to home base before when i couldn't move... waiting to hear from you, if you've had similar experiences...
Thank you for reading this ... was wondering if this is normal or if something needs to be done....??

This has been happening a while now. The person who creates the adventure only has one landing zone now, and people you invite to the adventure (if applicable) have the alternate landing zones now. Been that way for a few months to my knowledge.

Was this the result of Law of Unintended Consequences or did they do in on purpose?