The link was posted in an earlier post, I'll put the pertinent information below, but it's been this way for years, and was that way when you booked your cruise. There are a considerable number of perks you get for Concierge level, so it's not all about the number of reservations. But if you wanted more you could have spent more and gone for the PH level, which would double your reservations.
Guests are permitted to make the following reservations in our specialty restaurants - which vary by ship, category, and length of cruise:
Marina, Riviera, Vista and Allura
Owner’s Suite, Vista Suite, and Oceania Suite
Cruises 7 days or less: 1 reservation at each restaurant
Cruises 8-17 days: 2 reservations at each restaurant
Cruises 18 days or more: 3 reservations at each restaurant
Penthouse Suite
Cruises 17 days or less: 1 reservation at each restaurant
Cruises 18 days or more: 2 reservations at each restaurant
Concierge Level Veranda, Veranda, Ocean View, and Inside Stateroom
All cruises: 1 reservation at each restaurant