What you attached was just a sample grid, it doesn't have any of the attributes in it that would create what I described.  Below i've attached all of the xaml i'm using to create this grid.  If you copy this into a project, you should be able to reproduce the issue.

To answer your question, yes that is my problem.  Once I minimize the window and the scrollbar populates (as it should) at that point I can't drag a column over to the right in an attempt at viewing more of the contents in that one column.  When I try it is locked.  I understand why i can't drag it to the left, because it has hit its label/cell min.  but i should be able to drag it to the right as far as I want.  At that point your scroll bar will shrink, because more real estate has been added due to you making the column bigger.

I know other grids are reacting this way, perhaps it's a problem with the LabelWrapping property, I don't know.  I just know something is keeping me from expanding a column once either all columns have hit their min or the scrollbar is enabled.  Obviously I can't really isolate the issue since you don't get one without the other. (the scrollbar is enabled because you have hit your min.) 

I hope what i've attached helps, any feedback would be much appreciated.

I cannot run your project. It is not possible, because they are many references missing and I have to delete most of your code to compile.

So that is why I created a small sample of my own resembling your structure but am not able to reproduce it.

As I said in my last post, you can contact developer support and reference this forum thread and provide a sample that compiles so that we can investigate this more deeply.

It has been nearly a month since my first posting concerning this topic and no one to date has been able to assist me with finding a solution.  Obviously this issue must be a bit more complicated than normal, can someone please escalate this up so that I can communicate with someone that might be able to assist me better?  Thank you-

I've provided quite a few samples in my previous posts.  In my first post I provided sample xaml that showed how I have my fields arranged as well as a picture of what was happening, and in my following post I provided a zip file with the entire xaml file as well as the accompanying cs. file. 

If you unzip the file I attached previously and bring it into your environment, you should definitely be able to re-create it.

Is there an update on this?  If there is more information needed, please let me know.  I assume you were able to import the xaml file I attached?  If so you should see the issue I'm experiencing.  Thank you-