Multiple Themes and widget areas

I have a question how MiniMU is supposed to work with widget areas. In particular, my second domain seems to lose the Primay Sidebar widget area unless it has exactly the same theme as the first.

Here are the scenarios:
1. I add entries into MiniMU settings with:
domain1.com
Theme = Weaver II
domain2.com
Theme = Weaver II

In this case, both domain1.com and domain2.com use my default template which is two columns with a primary widget area on the right.

2. I then change MiniMU settings to be:
domain1.com
Theme = Picolight
domain2.com
Theme = Picolight

Once again, I have a theme with two columns and a primary widget area on the right.

3. I now change to use different domains:
domain1.com
Theme = WeaverII
domain2.com
Theme = Picolight

Now, domain1 has two columns with a widget area on the right, but domain2 no longer has the widget area.

4. I try the reverse:
domain1.com
Theme = Picolight
domain2.com
Theme = WeaverII

Once again, the primary widget area only appears on the domain1.com

So the observed behavior is that the second column and primary widget area goes with the theme used by the first domain. As long as this theme is also used by the second domain, then I get the widget area. However, if I use different themes than only the first theme has the widget area and the second does not get any widgets.

Is my observation the intended behavior?

If so, then this limits the value to me of having different themes. At minimum, I’d like to find a way to use the *same* widgets for both themes, e.g. “Meta” to allow a login into the dashboard or other useful widgets I’ve added to the theme. Is there some other way I should be trying this?

http://wordpress.org/plugins/minimu/