The correct fix would be tear it all out, cement board the whole tub surround, redgard to create a waterproof surface, and then tile. 

., this is obvious.5>As mentioned above , just a few are getting tons of cash - which means they can buy out business and other companies at very low cost and this means further super consolidation of power - literally cementing it in place. 6>The future for the average citizen is not looking good. 

Like the dentist says before he starts drilling, "you may feel some discomfort."

You also have affluent people like dentists filing for them which makes the situation unique Not sure they fixed loophole in stimulus where low wage workers would make more by not going to work,  will crush small businesses already struggling with margins the good news is in light of a recession, talk has begun of many manufacturing sectors not only being moved out of china, but back to the US.

There is still a lot of thin set sticking to the cement board should I just scrape that off to get it level again or is there a better way?

The liner was also cemented around at the top of the chimney.

People aren't going to see their dentists, optometrists, even primary care physicians, at least not enough to warrant demand from medical labs supplying tools, materials, supplies, etc. 

It wouldn't meet building codes, back then, 3 families requires fire escapes, cement walled furnace rooms which two families do not.My duplex has a CO for 2 in the buildings department, and the finance department listed it as a 3 family.

Hammer it to get between the cement and the stud then pry.

The cement floor was upheaved when we bought it there is a garage with plenty of storage so we just locked the shed and excluded it’s use from the lease.