When you categorize a transaction, and Zoho asks if you would like to make it a rule, you are not allowed to select whether your criteria are "all" or "any". The default is to create "any". This means that for my fuel expenses, where I set the criteria to "> 20" and includes "gas station", that ALL future transactions that are over $20 are auto categorized by that rule. I have to go into "Manage Transaction Rules" and select "all" before I continue working in my bank transactions.

Thanks
Sean Garland