Yes, since the yeast has more time to work, it takes much less. I made the mistake once of using a full sachet of yeast in an overnight dough and found it overtaking my fridge the next morning.So you used less yeast for the overnight rise? Is the flour pre-prepared mix?
The flour is just bread flour. The whole recipe is flour, sugar, yeast, water, salt, and oil, done in a food processor.