If you summarize (recommended),
you only need to supply details of 1099-B covered transactions with adjustments that are not listed on your e-Filed Form 8949. and all non-covered transactions not listed there.
A couple of years ago, TurboTax changed the processing of Form 8949 in an undocumented way.
TurboTax takes advantage of this rule and suppresses some line item details.
Your results for broker no.1 are correct.
Based on prior forum complaints about this. it's not clear exactly what rule it is using, and there is no way to force TurboTax to list all transaction details on Form 8949, as allowed by IRS.
Maybe that's been addressed. I doubt it.
@VAer
