Unknown artifacts in photos taken on Halloween

One other thing that happened during the period that I was not able to access my blog. This occured at mid-night, October 31st. I had several readers request that I should attempt to take pictures around mid-night on Halloween. Whether or not I think that Halloween is anything significant or not, taking some shots around the house at roughly the stroke of mid-night certainly wouldn't cost much, so I decided to try it. Although I have better cameras (I still use the 35mm film type) the one that was loaded with film that had a number of shots already on it is an old Anso point and shoot. Truth to be told, I didn't expect to get anything but pictures of the rooms I was taking, I think next year, I'll try some experimental work with better cameras. At midnight, (the Parlour clock hadn't struck yet) with the house lights out, I shot a flash picture of the front stairs and another, as the Parlour clock struck 12:00, down the front hall. I immediately moved into the Parlour and shot a third picture and then moved upstairs to the Greenroon where I shot a fourth shot. I finished the roll off with shots of my dogs a few days later and sent the film away for processing. When the film returned the pictures were bright, clear, and should have been quite satisfactory. But not quite, on three of the four shots I made on Halloween night, there appeared round disk like artifacts. One large one going up the wall (or appearing to) on the right side of the front hall staircase. The picture down the front hall did not show anything unusual. The picture in the Parlour shows a slightly smaller disk in the back wall; smaller but quite evident. I almost missed the disk shape in the Greenroom, but it is definitely there over the headboard of the bed. Smaller and fainter than the other two, but definitely there. The film processor said the disks are on the film . The film is not flawed nor are they the result of development bubbles. The professional photographer who lives across the street had no explaination for them; he'd never seen anything like them. I was a semi-professional photographer in my younger years and processed my own film, but I had never encountered anything quite like them. They are very difficult to discribe. Many of you have possibly seen photos with white globs floating in them. Some people call them "spirit balls", they do not look like them. These disks are perfectly round, they are well defined even though the background shows right through them. I had several shots of both the inside and outside of this house on that roll of film, but the disks are only seen on three of the four shots I made at midnight on Halloween. If I ever learn how to post photos, I will. At the present time there are only four worth considering. These three plus the one I took some months ago that has a "smear, or discoloration, or something" that is about head high on the front stairs. To me it looks like a womans head. My wife does not see a womans head just a discolored spot. Two other neighbors say they can see a head but not sure of the sex, a nephew says it looks like a portrait of a woman to him. It may only be a smear or blotch; I really don't know. I'm quite aware that flying debrie and dust motes can come through as a glowing spot, but these do not look like them at all. Any of you with a logical explaination would be most welcome.