Retirement tax questions

My basic question is 1099-S as a general category seems incorrect vs 1099-B for stocks. 

Seems it is for property and 1099-B is for stocks. 

 

There are few post I found that support my thinking, really confused how to make sense of this, please advise

 

https://ttlc.intuit.com/community/investments-and-rental-properties/discussion/how-do-i-write-off-wo...

 

https://ttlc.intuit.com/community/taxes/discussion/how-do-i-record-stock-loss-due-to-bankruptcy-of-a...