I am guessing you are shooting for equal volumes, but you didn't check off the option to 'drain the mash tun before starting to batch sparge.' If not, then the program is correct -- your liquid from the mash plus your first batch sparge water infusion should add up to be the same volume as your second batch sparge water addition. It is the runnings that you are attempting to equalize, not the amount of sparge water additions, necessarily.
If you enable the 'drain the mash tun...' option, you should either get two similarly sized batch sparge water additions, or one big one (depends on the size of your mash tun and what you set for the 'Batch Sparge using batches that fill _____ % of the mash tun' option.
