Roles Cannot Update Post, Only Original Creator

I have a quick question that I hope you can help me either better understand or help me achieve the goal.

We have a list of locations which have users assigned to a role based on their locations. We would like to create a content type that allows any user role of any location to add content with that content type. I have this covered pretty simply just using normal permissions.

My issue now and I'm hopeful that this module will help me is to allow:

1. User of a location role can only select their location (This I've got down).
2. User of a location role can update their own post, if they select their own location (This works).
3. Any user of a location role, can update a node for their location no matter who in their location added the content. For instance if there are 30 people with the role: Downtown anyone can edit the content for the entries where Download is selected. This is where I'm having difficulty.

I have the permissions set for the location in the TAC to View and Update, but it still only allows the original creator the ability to update the post, not anyone else in that user role.

Can anyone help me think this through better or provide any solutions?

Thanks for your time!