Any federal law is the minimum the states are well within their rights to amend more laws on top of the minimum as long as they are adhering to the federal regulations. 

The cleanest, but perhaps not the easiest to make happen, convince/pay the former owners, assuming one of them is the trustee, sign a QCD.Here, the bank would have to reopen and amend the foreclosure.....not a start over from scratch.

As @Brent Grizzle mentioned, if I find out that someone is licensed and didn't disclose it, I will amend my escrow instructions to cover the disclosure as it needs to me made.

My question is does do we have to amend the lease from our names to the LLC.

You can still rent to a group of people under one lease, you would just need to amend it if they had someone move out and had a new roommate move it.I have had several tenants which were roommates and just knew each other through work or school. 

.• Comprehensive Residential Lease• Pet Addendum• Lease Extension• Rental Application• Lease Guaranty• Move-in/Move-out Form• Lease Amendment• Lease AddendumI got them from the Bigger Pockets resource link: https://get.biggerpockets.com/forms/index/Thanks in advance!

So in shot- there is nothing to consider- it's a requirement and if you haven't been doing it you should find a tax professional to correct it via amendment or 3115. 

The other side of the duplex has some minor issues of conduct, but I can handle those with a few property amendments (like adding a fenced in place to smoke outside and more garbage cans for the whole building) and a brief conversation.

Then you could amend the lease for the new roommate.

We have the same process and amendment to the lease as @Cassi Justiz mentioned before.