How to Account for Next Month's Rent without Going Negative?

I'm trying to figure out a specific budgeting problem with the Spending Plan and I'm hoping to get some advice.

I get paid every two weeks. My rent payment for the next month is paid on the first day of that month, using money I've saved during the current month. The issue is that Simplifi's Spending Plan resets each month and doesn't account for the previous month's balance.

Here is the problem:

• My rent is set up as a Bill and is correctly placed in the Spending Plan for the month it's due.
• To save for that rent, I thought of creating a Savings Goal for the next month's rent and including the monthly contribution in my current month's Spending Plan.
• This is where it gets tricky. My current month's rent is already a Bill that is deducted from my current month's income, leaving me with a small "Available to Spend" amount after all planned spending is accounted for.
• When I add the Savings Goal for the next month's rent, my "Available to Spend" number goes negative. The app isn't factoring in that I've already set aside the money from the previous month to pay the current month's rent.

Basically, Simplifi is double-dipping. It's deducting the current month's rent from my current month's income and then expecting me to save the money for next month's rent from that same reduced amount. I can't seem to make the math work without having a negative "Available to Spend" total.

Is there a better way to handle this, or is this a known limitation of Simplifi's Spending Plan? I want to make sure I'm not missing a feature that allows me to correctly account for a rollover balance.

Any advice or workarounds would be greatly appreciated. Thanks!