That what I said would happen.
I know this, because it already has happened, on Mondays during light volume periods in the summer, or particularly on the day after the 4th of July, when local management is forced to generate an impossible stops per car metric and cut out cars to the point where the total number of dispatched routes is less than the number of daily pickup routes for the center.
When this occurs, management has no choice but to combine two entire pickup routes onto one car. The fact that it is physically impossible to service or contain two full pickup routes into one car is irrelevant; they are compelled by the geniuses from IE to dispatch it anyway and intentionally set the driver up to fail. It is nothing but an exercise in forced stupidity in order to generate a metric.
Spreading light volume over 6 delivery days vs. 5 will only make this problem worse.