On dual monitor, unmaximizing Evolution windows makes them huge

[Edwin Lee]

Ubuntu 12.04 64-bit
Standard Unity environment
Evolution 3.2.3
Dual monitor set up

I usually run Evolution maximized on one of my windows. Occasionally I want to un-maximize the window for misc reasons. When I unmaximize the window, it will sometimes get bigger, appearing to be the entire size of both monitors. I am trying to figure out when exactly this happens because it isn't consistently happening. It may be on the first un-maximize attempt of a session, as it didn't happen right now when I tried it.

Is there possibly an initialization for Evolution that attempts to set preferred window size to the entire desktop rather than a single monitor?

If I can diagnose it further I'll add comments.