I had assumed previously that you were using a travel agent you actually knew and had used before, but I take it you just booked through the likes of Expedia/Orbitz? They aren't really a traditional TA and will not provide much in the way of customer service or support.

Go by what the airline states for luggage.

You should have received an E-ticket with an e-ticket number for each passenger. If you have the booking reference you can open the booking in www.checkmytrip.com and it should list the status of the booking as "ticketed" rather than just "confirmed". You will need to ensure your booking is ticketed otherwise you will not travel.