xref attach layer settings in sheet

Here's what my setup is:

I have a Base.dwg where I xref-Attach a Proposed.dwg file into. I changed the Color=gray and Plot Style=Existing of the Proposed xref in the Base. Visretain=1.

I now create a Sheet.dwg and xref Base into it (and Proposed comes along too). The settings for Proposed are not what I have set in the Base file, they are what's in the original Proposed file.

Can I get these settings to come through? I cannot go into the original Proposed file and change settings.

C3D2012 W7