CompTIA Certifications

I just realize after doing the Network+, it also extends the expiry date on A+. I figure wouldn't it be more logical to just re-up security every 3 years, instead of going through this CEU business. It's a little bit more expensive, but it saves alot of time.
Comments
From my understanding, if you have all three certs (A+, Network+ and Security+), you can pay $147 for the CE program and then you earn 50 CEUs to upgrade Security+. It will automatically upgrade the other two (A+ and Network+) [I see now that CASP has been included. If you have the CASP certification, you have to complete 75 CEUs for that one and that renews the lower three.]
http://certification.comptia.org/Libraries/Certification_Documents/ceu_faq.sflb.ashx