There's literally multiple valid reasons to do so.

It has never made it to any of the signed documents, including CDs, rate locks, ...The rate lock is still valid for another 20 days (without any mention of moving money over).I don't want to sound entitled, but this is a difference of $200/month and adds up over 30y.I would move my brokerage account over for the low rate if that was possible.

Can someone confirms the validity of these type of deals?

The assertion that the taxes are only going up is not valid in this case.  

Consider picking up some of the expenses a seller might normally pay like for survey or title....loose the home warranty....

A warranty deed is recommended over a quitclaim deed to maintain a stronger chain of title.

I suppose it could certainly take longer to sell, and thats fine, but, I'd be concerned that the pool of potential buyers would be so small that it could be subject to severe downside price volatility (aka just not being able to find a buyer at a fair price, forcing me to discount it)Are these concerns valid, and how should I approach this situation?

It wont get removed the first time, or maybe not the 5th, but sooner or later some creditors will fail to validate and it will be removed. 

Generally, the coverage of the policy will state; “The coverage of this policy shall continue in force as of Date of Policy in favor of an Insured after acquisition of the Title by an Insured or after conveyance by an Insured, but only so long as the Insured retains an estate or interest in the Land, or holds an obligation secured by a purchase money Mortgage given by a purchaser from the Insured, or only so long as the Insured shall have liability by reason of warranties in any transfer or conveyance of the Title.” 2) The lender is generally going to be happy to receive the mortgage from anyone as long as its paid.

Hey there, might be a dumb question but when we talk to the seller about earnest money and they agree to $10 to make the contract valid, do we give them directly or give the title company the money?