Sorry for the confusion! I'm not sure what Report you might be looking at, but it sounds like you're expecting to see a total spending number equal to the sums of your Envelope budgeted amounts, given that your Envelopes were all zeroed out, and are instead seeing a different number.
This could have happened for a number of reasons. For example, you could have started the month at an Envelope balance different from your full budgeted amount, meaning your total spending would be different than the budgeted amount sums. You could also have an Income amount different than your budget sum.
If you're still confused, would you send us at email at email@example.com with your household email address and the Report you're looking at so we can take a closer look and try to get you a personalised answer?