Question regard seller not providing "Bill Of Sale". Please help!

[Gustavo Dominguez]

My wife and I are in the process of purchasing our first multi-unit property, but there is an addendum to the contract that sounds a little unusual. It says seller will not provide a bill of sale and will only provide a special warranty deed. The seller also mandated the title company that we use and states that we will be responsible for all title fees (transfer tax, insurance...).

Is this normal? Or does it sound unusual? From what we're reading, it sounds like there could be title issues from a previous owner? What do you guys think?