You may want to double check your contract with them, I am certain there is a clause about this. 

It has nearly doubled in value. 

If you can lever up 4x to 5x on a $2M property that doubles in value every 10-12 years, who cares about landlord-tenant laws?

Therefore you are taking bad information and then interpreting it incorrectly which is double trouble. 

You also have to know whether it will be an assignment or a double closing.

I was shocked to see that she doubled her price in a year. 

Since they did not want to disclose how much they were making in the deal they opted for a double closing. 

Currently I’m operating it as a STR, but I need a new cleaner and the quotes I’m getting are in some cases double my nightly rate, and the amount it grosses is only slightly more than what it will do as a LTR.

If you wish to double check every pre-approval letter that is your prerogative but you are choosing to do this work yourself.

Double check market rents.