Might help to post the profile you're using and how your mash volumes are messed up. Maybe post a sample recipe with your setup too.
For starters: make sure your "Mash/Sparge Water Calculation Method" is set correctly (should be "No sparge" for full volume BIAB) and that "include grain volume in mash limits" box is checked.
Here is the profile currently used, I had way too much water in the mash (about 3 gal over) which needed to be boiled off, the mash was super thin:
Batch volume target=Fermenter
Batch Volume=10.5gal
Calc boil volume=yes
Boil off=1.5gal/hr
Pre boil volume(auto calculated)=12.59gal
Trub/Chiller Loss=0.15gal
Mash-Tun Deadspace=3gal
Mash-Tun loss=0
Brewhouse Efficiency=70%
Mash Efficiency(auto calculated)=71%
Calc mash efficiency=yes
Hop utilization=100%
Mash/Water Method=No Sparge
Grain absorbtion=0.383 qt/lb.
Water/Grain Ratio=1.294 qt/lb.
Include grain volume in mash limit=yes / Min 5.5gal / Max 20gal
Here is the recipe I used:
Munich Slam Dunkel
Munich Dunkel
5.9% / 18.4 °P
Recipe by
Rough Sketch
All Grain
Brewhardware 20G 240V
70% efficiency
Batch Volume:
10.5 gal
Boil Time:
60 min
Mash Water:
15.01 gal
Total Water:
15.01 gal
Boil Volume:
12.59 gal
Pre-Boil Gravity:
1.067
Vitals
Original Gravity:
1.076
Final Gravity (Adv):
1.031
IBU (Tinseth):
28
BU/GU:
0.37
Color:
20.5 SRM
Mash
Strike Temp —
127.2 °F
Temperature —
122 °F —
15 min
Temperature —
145 °F —
35 min
Temperature —
158 °F —
35 min
Malts (30 lb 8 oz)
14 lb (45.9%) — Bairds Munich Malt — Grain — 6 SRM
12 lb (39.3%) — BestMalz Munich Dark — Grain — 13 SRM
3 lb (9.8%) — Weyermann Pilsner — Grain — 1.7 SRM
1 lb (3.3%) — Briess Victory Malt (biscuit) — Grain — 37 SRM
8 oz (1.6%) — Weyermann Carafa II — Grain — 415 SRM
Hops (2.5 oz)
1.3 oz (27 IBU) — Chinook 13.3% — Boil —
60 min
1.2 oz (2 IBU) — Hallertauer Mittelfrueh 3.2% — Boil —
5 min
Hopstand at
172 °F
Miscs
2.7 g — Baking Soda (NaHCO3) —
Mash
0.5 g — Calcium Chloride (CaCl2) —
Mash
2.5 g — Chalk (CaCO3) —
Mash
1.3 g — Epsom Salt (MgSO4) —
Mash
1.4 g — Gypsum (CaSO4) —
Mash
0.13 g — Sodium Metabisulfite (Na2S2O5) —
Mash
Yeast
1 pkg — White Labs
WLP820 Octoberfest/Marzen Lager 73%
Fermentation
Primary —
48 °F —
5 PSI —
18 days
Carbonation:
2.5 CO2-vol
Water Profile
Ca2+
27Mg2+
2Na+
22Cl-
8SO42-
26HCO3-
103