Hilton HHonors - Embassy Suites double base points for S. California offer

I just received an email from "Embassy Suites of So. CA" that reads
LIFE IS TWICE AS REWARDING
WHEN YOU VISIT SOUTHERN
CALIFORNIA.

For a limited time, earn double Hilton HHonors(R) Base points when you stay at any of our 17 Embassy Suites Hotels® in Southern California. You’ll earn your way toward the HHonors rewards you want twice as fast - from free nights to dream vacations! Receiving double Base points is easy - simply register online and stay with us between now and
April 6, 2009.

Points & Miles(R) and No Blackout Dates. Only Hilton HHonors(R). Earn and redeem at more than 3,000 Hilton Family hotels worldwide. Click here to enroll online or call
1-800-HHONORS.
The link takes me to this page http://embassysuites.hilton.com/en/es/promotions/es_socal/index.jhtml;jsessionid=CWHFUTKRFVNVOCSGBJC4LYQ
but when I try to register it says I'm already registered. Is Embassy Suites just hijacking the Hilton Q1 promo or is there a separate promo? Anybody else get this email?

The final registration link takes you to the systemwide double points promo, so it does seems ES has "hijacked" the Q1 promo.

The final registration link takes you to the systemwide double points promo, so it does seems ES has "hijacked" the Q1 promo.

That's what I thought. Lame. I have a stay at an ES coming up, too.