Confused about Double Closing

[Chanel Realegeno]

I have access to MLS reo listings. I know you can't assign REO contracts but I'm confused about double closings.

I have a LLC set up and can sign the contract under the LLC but people say I have to sell my LLC. What do you mean by that?

Please someone walk me through the process of doing a double close with a LLC.

What it be better to do it with an attorney or title company?