the rule system in Mint is pretty terribly broken. The large majority of the transactions i make don't get categorized/processed properly. I reported this to them over a year ago and they did nothing to fix it.
Have you looked at the same transaction with your credit card company to see if it's different? And possibly that it would change slightly if you performed another transaction with the business?
Mint has said they don't apply rules to transactions that are unique. Yes that means Mint wont be able to handle transactions from Walmart, Target, Amazon and countless others. Mint can't figure out that Amazon.com*123346 is from Amazon (Yes, this is real).
I see a lot of transactions that come in where they look painfully simple. Apple.com/Bill for example. And I'm like "how can you not figure this out?"
But when I look at a gas station transaction I can see that somehow, the rule changes between Mint and the credit card. Typically the address gets changed/obscured.
So my theory for you is that the rule is unique and somehow, the uniqueness was removed and so it looks broken, but it's not. It's just painfully stupid because Mint doesn't use machine learning.
