Can't stop iTunes downloading content bought on another computer

[zen]

This is driving me crazy. I have a Mac mini and a rMBP. Both are logged into iTunes using the same Apple ID.

I buy music, films, etc, on the Mac mini. The theory is that I download these to my Mac mini, but I don't need them on my rMBP, so I have my rMBP iTunes settings looking like this. None of the automatic download options are selected:



But what happens? Every single time I open iTunes on my rMBP, it starts downloading a 4GB film, which I bought on my Mac mini:


I pause it. I remove it from downloads. Next time, same thing happens.

I have very limited (and slow) internet bandwidth, so this is a problem.

Am I missing some setting? Or is iTunes just buggy?