This is hard to diagnose because it seems like the session data is incomplete. You have a preboil gravity recorded as 1.071, but post mash is only 1.058? BeerSmith expects the difference to be from kettle sugars and your recipe has none. The mash efficiency is calculated from the post mash number you fill in. If that's brought up to 1.071, your mash efficiency is 71%.
The volumes you recorded don't match what your equipment profile expects. You recorded 5 gallons both pre and post boil, but your profile expects 1.5 gallons of boiloff to concentrate the wort. If you had 1.080 at 5 gallons post boil, then you should have had 6.35 gallons preboil at 1.071. Adjusting preboil volume for this gives mash efficiency at 64.7%, much better than the 58% BeerSmith estimated.
The equipment profile has no losses for trub. Although the batch size is 5 gallons, the estimated post boil volume is 5.5 gallons there. Just adding 0.5 gallons of trub loss, plus making the post mash gravity and preboil volume correct, raise the estimated brewhouse efficiency to just under 64%, much closer to what you seem to have achieved.
The bottom line is to just make sure your measurements are accurate and incorporated into the equipment profile. It can take many brew sessions to dial it all in.
I'm not sure what you're seeing in my equipment profile, but everything seems ok on my end. I've been working on tweaking my equipment profile to make it as accurate as possible. But there has to be something I'm missing.
All the volumes that I can manually record are recorded. I cannot change post mash gravity (Beersmith won't let me, and it estimates it automatically), which should equal est pre boil gravity if no more sugar is added. I didn't add any extra, so I don't know why my est pre boil gravity was so much higher than estimated. This was my 4th BIAB, and I've hit all my number so far. I just used a much bigger grain bill this time, and I know my efficiency suffered.
I put 5 gallons into the fermentor. I had roughly another 1/4-1/2 gallon or so that I just didn't add. My preboil volume was 7 gallons and my post boil was 5.5, which is what my equipment profile says. Beersmith also does not estimate BH efficiency. I've had to manually adjust the BH efficiency to get better estimates (after the boil and reading the OG), which has worked until this beer. I know it's because of the larger grain bill, I just want to know why BS estimates my pre boil at 1.058. Seems way low. I got it up to 1.062 after adding the .5 gallon trub loss, but that's still low for an estimated OG of 1.081. I've attached recipe again, accounting for the .5 gallon trub loss.
And thanks Kevin, I've seen those vids on Brulosophy. I used them to help set up my BIAB profile. That's why I'm so stumped.