Because you don't have the time, they underestimated how many they would need to beat him so were rushed to get them in AND the clowns they pay to ballot harvest are not paid much so they just put in Biden and submitted the ballots.

Also the software they used to fake the numbers to get Biden up had to make up so many votes and was so poorly written that it did straight up totals instead of more believable curves,

They botched this and they will be caught.