Can someone who uses drawings or photos as sketch tracing templates take a look at the attached file.

I got it from www,the-blueprints.com. I left two sets of sketch lines, orange in color. The rectangular sketch is supposed to be the side window while the second single line viewable in the top view I just put there to check the images that I downloaded and lined up for tracing. Clearly things do not align when you place the points in the right place in each view.

So my question is, are the images that I got messed up or did I align them incorrectly? It looks pretty close when I zoom in and rotate in the 3D view but clearly something is WAY off. The view is set to parallel projection but my guess is that the images themselves have perspective in them.

Thoughts? Comments?