WPA2 shows as WPA

I have set up my airport extreme (firmware 7.2.1) for WPA2 Personel. I did the same in network preferences on my macbook. But the strange thing is that network preferences will always show it as WPA Personel. I have no trouble connecting and suspect this is just an interface bug. But I can't be really sure what kind of connection I am making. Did anyone notice this problem?

I just got a brand new router and am running Lion and these are the settings:
I would guess it has to do with the router and/or the older vs. newer OS and wouldn't worry about it as long as WPA2 is active. I checked on my router settings and this is what it comes up with.

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    Hi,
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    TKIP and AES are two different types of encryption that can be used by a Wi-Fi network. TKIP stands for “Temporal Key Integrity Protocol.” It was a stopgap encryption protocol introduced with WPA to replace the very-insecure WEP encryption at the time. TKIP is actually quite similar to WEP encryption. TKIP is no longer considered secure, and is now deprecated. In other words, you shouldn’t be using it.
    AES stands for “Advanced Encryption Standard.” This was a more secure encryption protocol introduced with WPA2, which replaced the interim WPA standard. AES isn’t some creaky standard developed specifically for Wi-Fi networks; it’s a serious worldwide encryption standard that’s even been adopted by the US government. For example, when you encrypt a hard drive with TrueCrypt, it can use AES encryption for that. AES is generally considered quite secure, and the main weaknesses would be brute-force attacks (prevented by using a strong passphrase) and security weaknesses in other aspects of WPA2.
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