TIC carries a 100% interest in the property for all joint owners ...this is a legal issue ...

Unless and until you have a genuinely solid answer to that question, do NOT sign anything.

Perhaps, I can connect with a joint venture partner who has acquired a lot and wants to co-build a duplex?

You can learn by joint venturing with a more seasoned investor that has previous experience with working out notes.

Putting that aside, they may have been changing the language of the deed, for instance tenants in common and changed to joint tenants with the right of survivorship.

I am genuinely excited to be able to engage this kind of motivated community to help better understand the nuances of real estate investing and apply it to my goals.Glad to be here,Jason

My last install a few months ago I used one from Lumber Liquidators that was 10mm and had beveled edges so you don't get the characteristic peak at the joint from the planks flexing.

Start out by thanking them for there concerns and criticisms by making you aware then genuinely telling them what makes them a good tenant and characteristics you admire, after that tell them why this arrangement will be mutually beneficial.

I make the phone call, do a quick search on Craigslist, and now I have(well tomorrow) will have a Joint Venture going on. 

There are many factor when setting up a joint LLC including if someone dies you will have to know how to proceed with 2 different types of LLC partners; 'Right of survivorship' or 'Joint tenants in common' .