Yeah that is the only thing, when you scan across you notice the different light levels. Not much you could really do about that, during that time of day... still a great shot!
That is something I don't quite understand, really. Same shutter speed, aperture, ISO all the way across the frame. In theory it should all "blend" together seamlessly, but there has got to be some adjusting going on somewhere in there...and I'm thinking it's when it gets converted from RAW to JPEG. I don't *think* I'm using any presets in Lightroom.
also, it was only a matter of seconds between frames, BUT, the sun was coming up pretty fast at that point. So maybe that's what it is.