Maybe we do make it a little too easy to overthink these things :)
Remember the TIME MACHINE makes deposits and withdrawals from your accounts as you order them, but it will also make sure that at the end of the year, after all that you told it to do with your INCOMEs, EXPENSEs, SAVINGs, etc., and after taxes, that it will deposit any excess or withdraw any deficit to/from your accounts. See the video on how the TIME MACHINE works
I said it has a one-year resolution because it checks that the cash flow works only once a year, not every month or day.
In some years where you have an excess, you may need money before your windfall and possibly you could have invested in your accounts earlier. In other years when you have a deficit, you would need to withdraw earlier. So it's a little off in the amount of growth in your accounts for those months compared to if you were actually investing every penny you could every day.