I would try to amend it rather than keep digging if possible.

It is Agreed this date x/x/xx that the existing lease for the property at address x is amended in the following ways.

Additionally, since you have more than one year of experience as a landlord, it unlocks your ability to use the departing residence rents to not only fully offset your mortgage, but also if there is any that exceeds it.You can amend your last two years taxes if needed to reflect that.

Or is a refund of those 11 days and amending to the 1st the only way to go about it?

Now they have said they are sending an amended contract for slightly less than offer price but with two days left to closing we still have not received it.

There has not been any amendments to the operating agreement to add "members/managers" to the LLC.

If you didn't record the house hack rental income on 2020 and 2021's taxes, I advise you amend your taxes to reflect that.

You could amend and re-file up to, I believe, three years worth of tax returns.

We have asked if that clause can be deleted, or amended in some way, and pointed out that surely they have to have professional liability insurance that would cover such an eventuality, but they all refuse. 

This won’t answer your question but I would definitely amend your lease to state the pets have to be licensed and vaxxed