i485 interview for my parents

[JaxSteph 0]

My parents are in the US and we did a concurrent filling. I submitted the i130 and they submitted with me their 485. Afte4 months, we just received the i797c for an interview  (letterhead says notice for initial interview)

My questions are:

1)Should we JUST bring all the originals that we submitted with all the forms or is there any additional documentation I should bring with us?

2)My father had every document (including his Passport with tourist visa) with a birth date.. when we obtain his birth certificate and translated it for the documents, we realized he had been using the wrong birth date his whole life!. We processed a new Passport with his actual birthdate and the documentation was submitted with the correct date . Will this be a red flag and can be something the officer will frown upon? Can it be a reason for denial? To top it up, when he filled his paperwork, he made a mistake and put added my mom's birth year instead of his.. He sent a letter as soon as he realized it (we called the customer service center and they told us to do so) to notate the file... Is this another red flag?

3) What kind of questions should they expect?

4) Any advice would be greatly appreciated!

 

Thank you

JaxSteph