iTunes takes default focus when switching desktops (spaces)

This is more of a pet peeve than anything, but when I am swiping between desktops (spaces), and I return to my primary desktop, iTunes always takes focus.

99% of the time, I have switched from my web browser to mail (which I keep in another space) and when I return to open a new tab in the browser, iTunes preferences opens almost every time (command-T).

I would normally assume, or prefer, that the OS "remember" where I left off when switching spaces, and put me right back there when I switch back. Is there a way to force this?