Region 4 ,in most Elections are counted last , due the size of the voting block and almost half of the polling stations ,some polling stations have more than one ballot boxes , that's because the voters are large in the sub districts ,tallying the votes of other Regions , which are declared first , shows the PPP always ahead.
GECOM ,try to keep about 300 votes max in each ballot boxes. Large voting districts ,the voters names are split up alphabetically ,for example A-K and L-Z
You don't have to be a rocket scientist to figure that out.