Mysterious size increase

Wondering if anyone can help me understand why a quicktime (6.5.2 pro) movie increased in file size after I decreased the resolution.
I originally "shared" from iMovie to QT as DV. That file is 720x480 and is 1.31 GB. I then opened that .dv movie file and went to properties>size>and adjusted it down to 540x360, and Saved As. That new file is a .mov file (I understand how QT does that but not sure why) and is 2.63 GB!
I didn't add anything; nor did I use export to change anything. Only Save As.
noodlehead confoun..ddeD

Colin
Thanks for that tip. I did a few tests and you're right. Though I can't see the "two copies" you refer to. I opened both and looked at movie properties, going through all the items. Everything looks the same in both.
Along similar lines, I am seeking info about export and compression options. I am about to create a new post for this, titled: "Great results but why?"
It refers to getting better results using Toast Video CD as an export option, and other questions.
Thanks again.
noodle--head

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