Boundary Placement Label method changed in 10.3.1?

[JoelCalhoun]

I have an atlas index grid that I label with the Boundary Placement option in Maplex.

In ArcGIS 10.2.2 the horizontal label on the bottom of a polygon would label properly (right side up).

However I have noticed that in 10.3.1 the label is now upside down. (See PAGE25 label in the image)  My thought is that the Boundary Placement option is now generating labels that always orient their "top" to be along the polygon edge.

I had to have someone who still has 10.2.2 export all of our maps.

I looked around the forums and couldn't find anyone else reporting this.

Has anyone else experienced this?  If so is there a setting to get them to orient right-side up?

Thanks

[WendyHarrison]

Hi Joel,

You should still be seeing the labels placed right side up.  Are the boundary edges coincident?  Or is there possibly a small gap between them and the label single sided boundary option is turned on? Could you share your grid (don't need the whole map) and the parameters you're using to label?

thanks

Wendy