Diamonds definitely get two free suite nights; what they were describing is what Platinums get. Here is the exact wording:

"Hyatt Card Suite Upgrade Free Night Awards

Your Hyatt Card Suite Upgrade Free Night Awards are available to use at participating Hyatt hotels or resorts worldwide before the expiration date listed. You may redeem your award by calling 800.xxx.xxxx or your nearest Worldwide Reservation Center.

Awards
Earned: 2
Redeemed: 0
Available: 2
Expiration: 30 Sep 2011
Call to Redeem:1-800-xxx-xxxx

Terms & Conditions

Suite Upgrade Free Night Awards are valid for use within one year from date of issuance. Hyatt Gold Passport awards indicating accommodations in a Hyatt suite for participating Hyatt hotels and resorts are for one-bedroom accommodations, and two bedroom accommodations at Hyatt Summerfield Suites. Hyatt Gold Passport Suite Upgrade Free Night Awards are not redeemable for suites at Hyatt Regency Kyoto, Hyatt Regency Paris-Madeleine, Park Hyatt Sydney and Park Hyatt Beaver Creek Resort, Hyatt Place, or Hyatt Vacation Club Resorts but may be redeemed for available standard accommodations at those properties. Suite Upgrade Free Night Awards cannot be redeemed for packages. Suite Upgrade Free Night Awards may be applied only to the guest room and do not apply toward food, beverage, incidental expenses, service charges, and hotel specific charges. Reservations for Suite Upgrade Free Night Award(s) redemption are subject to availability and must be made in advance calling 800.xxx.xxxx or your nearest Hyatt Worldwide Reservation Center. Free night awards are non-transferable. Offer may be subject to additional terms and conditions. Hyatt may alter or withdraw this offer at any time without notice. Hyatt Hotels & Resorts® encompasses hotels managed, franchised or leased by subsidiaries and affiliates of Hyatt Hotels Corporation. The trademarks Hyatt®, Hyatt Hotels & Resorts®, Park Hyatt®, Andaz®, Grand Hyatt®, Hyatt Regency®, Hyatt Place®, Hyatt Summerfield Suites®, Hyatt Gold Passport®, and related marks are trademarks of Hyatt Corporation. © 2010 Hyatt Corporation. All rights reserved."