So yesterday I was on an open highway and decided to clear out my X a little bit by doing a short WOT run. I was cruising at 60mph, slammed the pedal, it down shifted to 3rd revved to about 6800rpm (ish) then shifted to 4th and practically fell flat on its face. It felt like it shifted to 5th. I believe the RPMS fell down to around 4000/4200 RPM. Is this normal in the 3.0?

I did it again using manual shift mode to confirm it was the 3rd to 4th gear shift and it did the same thing, just feels like no power at all after the shift. It still accelerates but man does it feel like there is NO power...

Believe it or not this is the first time I have gotten on my X, I didn't buy it as a sports car so kinda drive pretty easy (all shifts under 3500rpm).

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2003 X5 3.0i
Premium & Sport package
Steel Gray Metallic
55K miles and counting