I use T5008 and Capital Gains Losses calc too

RE: Using EASY STEP  Premiun Edition -  auto calc of Capital Gains Losses  I entered T5008 all boxes and checked Captial gain.   TB says I owe $2K  I then, later on in the process, enter same info on TB "Capital Gains Losses" sheet to use last year losses to reduce taxes,  and then TB says I owe $ 4.6 K   ???   DO I REALLY have to enter the Proceeds of Dispositon (gain ) and  Book Value twice -- seem like that doubles my tax owed ????