Hello everyone:
I have strange spots appearing in various locations they are all identical round concentric circles the same size and greenish brown color. This floor was done about 7 weeks ago. Here is history of floor.
New white oak installed in 2005 bleached white stain and Bona Traffic. Refinished 7 weeks ago with same stuff

The spots are a very consistent shape. Is this the only area?
Is this shape the same as a water bottle or soda can?

They are occurring in several spots. This is very strange. The person who stained the floor was sweating . maybe this is the cause?????????

These spots seem to be similar to water spots, but too consistent in shape to be sweat drops. It's a mystery.