There are more inconsistencies. For instance, cloud reflections are not always the same as the clouds they are supposed to reflect.
The image is a multi-stich panorama, i.e., composed of several (vertical) shots, taken at different times. This, in itself, would not explain the reflection differences. It appears that Alain combined the bottom part from the frames that were taken minutes apart from the top part. Given the rapidly changing morning light, it isn't surprising that there are color and cloud movement differences. Like cubists, seems to me that Alain wanted to capture multiple facets of the scene in a single image. He is actually calling it a "collage," quite accurately, it seems.
