adding up means summation of a set of numbers in this case the votes on the schedule of the SOP. Counting is counting of each vote. This is why a recount means opening the ballot boxes and counting each vote
Counting numbers means how many numbers are present. Summing means adding up all the numbers.. ... Let's assume there are numbers from 1 to 5.. So countingfrom 1 to 5 is 5 numbers where as summing numbers means adding 1+2+3+4+5 which is15.