Interesting pics. By enlarging the areas do you mean that these are a crop of the original pics and did you adjust contrast or brightness? It would be good to see the originals as well, in paticular the 3rd pic as it seems a bit pixelated. The reflective sign in the one pic may be the cause of the orb or perhaps airborne particles, which appears to be what the orbs in the other pic are IMO? The reason I say this is the orbs don't seem to have their own light which is one the characteristics to look for.
I'm guessing you used a flash, do you know what the shutter speeds were? You can see that in the camera properties on original pics (or with EXIF reader if you use one).
I do see the area you are noting in pic 3 that has the blue haze in it. Do you have another pic w/o the haze that was taken from the exact same spot and angle? Not sure yet if there is an explanation to what may have caused this which is why seeing original pics and any others taken of the same spot can be helpful. Flash bouncing off a reflective object (refraction) and even slight movement of the camera at a slow shutter speed can create hazy looks. Not saying that is what this is as yet, just it's good to rule out all possibilites that may cause something anomalous to appear in a pic. Only had a chance to take a quick peek, so I'll take a closer look. Also curious to hear what others opinions are. =)