Sorry, that really bites that you spent plat on such a worthless task. Just for future sake there is an exclamation point that shows up when your level becomes too high for the dungeon you're in. You get a nice little message telling you what it's all about if you click it. Keep an eye out for it, but just in case 3 levels over the dungeon cap is the cut off, these values are shown on world map screen.

Here are some visuals to help you out in the future: