Per Apple KB Article: http://support.apple.com/kb/TS2518
It sounds like you're seeing an issue with Aperture 2.1.4 that was fixed in the 3.2.1 patch.
Aperture 3.2.1 Released October 28, 2011
- Addresses issues that could cause the Crop tool to switch to the incorrect orientation or resize incorrectly.
I would highly recommend purchasing the upgrade through the Apple App store to an updated version. (If you upgrade to Mavericks 10.9, you can move directly to Aperture 3.5), unless your workflow absolutely requires that you stay with OSX 10.8 and Aperture Version 2.1.4