Tw scoring bugged?

I have been watching our opponents attack and there's a discrepancy in 3 cases between the logs and the UI. There are 3 battles where the logs show 14, 15 and 15 banners (which mean a failed attempt on the team previously) but the UI shows only one team having 2 battles in it. 

Is it just a visual bug or should we worry about tw banners the same way that GAC banners are bugged?