Mint.com – How to Unhide a Card in Mint

Mint Budgets uses averaging based on past spending initially. You are able to control the value of the budget for each category though. If you are on the Budgets page, hover over the specific budget you want to adjust and click Edit Details. A dialog will come up that allows you to set the frequency, amount, and whether or not the value rolls over to the next period. You can also delete an existing budget from this dialog.

On the Budgets page, there is a Create Budget button you can use to add a new category budget.

Since there has been no activity here I will try answering. It looks like this is probably a bug. I just tried adding a future item to my budget list and the per month budget is getting reflected in my total on the right.

If you are still experiencing a problem with the totals not lining up I would submit a bug: https://www.mint.com/help/