Apparently, Google is showing signs of mixed and changing results at present. It struck us when our clients reported seeing different rankings for their websites at their ends, compared to our observations of their ranks from our location in Chicago. One of them reports seeing his website on the first page while we were stunned to find it on the second page at the same time. When we confirmed this with other clients in other locations, it showed the same behavior. It seems that an update is already taking place.
Normally, one would expect this phenomenon to be observed on Fridays but it appears to be different today.
So if Google is unfolding an update, be cautioned as you might find your ranks to change from what they are now to something different the next day.