Credit Karma bug?

I've been using Credit Karma to track my spending. Every week I'd go in and re-categorize transactions that were incorrectly categorized so that I'd have accurate per-category spending at the end of the month. At the end of June I noticed my June spend was looking really high. Some of the categories were reporting really high numbers. When I would drill into those categories I noticed the transactions inside of them didn't add up to the number the category was reporting which seems like a pretty big mistake.

What I think was happening is that when I re-categorized the transactions (say, a credit card payment moving from "Bill & utilities" to "Transfers", the spending categories didn't update.

Has anyone else noticed this or know of any way to fix it? Maybe removing and re-adding all of my accounts?