Brother MFC 7360 scanner - Scans from ADF are legal size, even though paper isn't

I've got a Brother MFC 7360 setup with network scanning. I redid the network scanning a while back to run on Linux. In all cases, scanning works fine, however, when I scan using the ADF, all of the scans show up as legal-sized (8.5x14), even though the page being scanned is letter size (8.5x11). If I scan by placing the page on the glass, it scans properly as letter size. Note that I have intercepted the raw scanned image that the scanner is returning - it's definitely sending an 8.5x14 image. I've run through every setting I can see on the machine, and the only thing that has to do with scan

Question by Michael Kohne on Super User, licensed CC BY-SA. We show a short excerpt and link to the original thread as credit.