I saw the deals for 5 days for the price of 2. In reading the conditions the terms say you can have 1 guest is this correct, am I reading and interpretting this correctly?

1 guest means 1 person only to that one ticket, so the deal only applies to yourself. If you are wanting to go for even day 3 days with two people in total then both of you need to purchase a multi day/multi park pass.

the tickets are per person (per guest). if you have 3 people in your group every person needs to buy the passes. they do finger print of each person when you enter the park incase you come back for another day.