Just returned from voting here in Marietta. This happened to my wife, but it was because she touched near the line between the candidates. If you don't touch in the middle of the area, it can happen. She saw what happened, and touched the Republican again, and it came up correctly.
I experienced a similar problem in Florida. I touched the screen to vote for a particular candidate for AG but when I got to the end and saw my review sheet, it indicated I hadn't voted for AG.
So I went back and revoted. I imagine, I hadn't placed my finger in the exact spot needed when I cast the vote originally.
With the review screens, I don't see how this can be a problem. If your review screen isn't right, don't submitt the vote.