Exterior Navmesh Issue

[fantazmic2]

I need help with an External Navmesh Issue:

 

I am working on a few external cells which I have changed. Before changing I removed the navmesh, created my exterior changes and manually created the Navmesh.

 

Before adding a door to an internal space everything works just fine...NPC's and Followers behave as normal, however...

 

...when I add a door to an internal space, and finalize the navmesh the green triangle appears correctly. When I travel to the location for the first time everything is fine. The problem happens when I return after waiting 24hours (with or without followers):

 

(Please note:) Certain NPC's are set to "Guard" with a radius of "0" and others are set to "Sandbox" with a radius of "1024"...packages which I created.

 

When returning to the external space after 24hrs, the NPC's move from the designated spot to another within the cell. I am working on multiple cells and this happens to each cell I place a door reference in. This happens regardless if I enter the interior space or not.

 

If I have followers, they will appear when exiting the door close to the same location the NPC's move to. (If visiting the area for the first time, followers appear in the correct place.)

 

Since this is happening to NPC's and Followers, I am guessing it is a Navmesh issue...however the issue only arises when I create a door to an internal cell.

 

Any ideas or help would be appreciated. I attached an image taken from the GECK...you can see where I placed the NPCs and they end up at the (smaller) mapmarker....the same for any followers when exiting the internal space.