No, starting to fill categories in advance did not break the YNAB system. Here’s what’s happening: When you have extra money left in a category at the end of the month, that leftover amount carries over to the next month. If your category has a target (like saving $100 for groceries), YNAB will show you how much more you need to reach that target. The “underfunded” amount is just what’s missing to meet your goal. If you started adding money to some categories before the new month began, YNAB will count that money toward your target. So when the new month starts, it only shows what’s left to add—not the whole target amount—because you already put some money in early. YNAB isn’t broken; it’s just showing you what still needs to be added so every category reaches its goal. If you want things back to how they were before, try waiting until the new month starts before adding money next time. Takeaway: YNAB keeps track of all your dollars and only asks for what’s needed to finish funding each category. Adding money early just means there’s less left to add later!