Edit the mash profile you are using and under 'batch sparge options' click the box which reads 'Batch Sparge with batches that fill" to let the program know you are not fly sparging. I would also recommend that you click on the box which reads 'drain mash tun before sparging' otherwise the program will divide up your sparge water to fill the mash tun before signaling the drainage step.
If you are doing a full volume BIAB, then check the box below that which reads 'BIAB mash with full boil/ and the program will apply all your mash water to the initial mash infusion.
