yeah - I found those too - neither the gaps nor locking the Profile file work for us (2 computers). 

Somehow I would have assumed this was pretty well built into the OS and didnt need to be re-invented... 

also found that lockui command does nothing: http://knowledge.autodesk.com/support/autocad/troubleshooting/caas/sfdcarticles/sfdcarticles/How-to-...

Also, looking at the Profile, it seems that the palettes on the 2nd display are showing with negative numbers in their locations (see below). Perhaps that's what's not getting read back in correctly?

<Palette Name="ACAD_XREF_MANAGER">
<State Collapsed="0" Visible="1" Docked="0"/>
<FloatInfo Top="627.000000" Width="437.000000" Height="411.000000" Left="-1285.000000"/>
<Resolution Width="4480.000000" Height="1440.000000"/>
</Palette>