Not too knowledgeable about BIAB but I use Beersmith and it may tell you something like "initially heat your water to 163.7F to end up at 152F for the mash."
- You didn't ask about the volume but you ended up with a higher volume than planned due to the boil not being sufficiently vigorous. Personally, I don't think the boil needs to be super vigorous.
In my opinion it would look like there are two things here and they both relate to your settings/setup in your equipment profile in Beersmith.
- Did you correctly setup your equipment profile in Beersmith to reflect what you have for gear?
1) your mash profile and 2) what type of kettle your using.
Equipment profile setup is one thing:
http://www.beersmith.com/forum/index.php?topic=5140.0I've tweaked some settings and values in Beersmith many, many times to reflect my gear. Everytime I change or update my equipment, I almost always end up changing some values in the equipment profile.
It takes a good five batches to get your head around the whole thing - Your gear, your boil-off, your volume, trub loss, etc.
1.018 for FG for this style is just fine. Good job.
Yes, your mash temp was high, but you didn't end up with a FG 1.032. And even if you did, it's no big deal. (Some batches don't come out how you think they will and other batches you think you totally messed up end they end up great. )
Also, don't get overly obsessed with efficiency. If you're in the ballpark that's great.
I'm not sure this is what you wanted to hear. I think you're doing everything fine, just a few minor adjustments and you'll be in great shape.