I'm Creative Director for a national classifieds paper and I prefer to hire self-taught over a degree because of artists such as yourself. If you went to school it would probably ruin you--your artistic skill would get lost in a heap of technical mumbojumbo. Fantastic work!

You can change the point on the frame that InDesign scales toward--after you select the transform tool just click part of the image that's within your workspace and when you change the dimensions the image will be brought toward that point--it looks like cross-hairs and if you can't see it within yo...

The only setting that I can think of that might cause this problem is in your general preferences - use area select. There's a similar setting that affects type in your type & auto tracing preferences - type area select.