Vocal Irregularity after applying Noise Reduction

In this new project I followed Bob Howes instruction:
‘Set the FFT size (on the advanced menu) to 2048 and grab a noise print from a gap of "silence".  Select the entire filed and do reduction by 7 or 8 dB and 15%ish reduction.  Set the FFT size to the next one up, get a new noise print and do another pass with the same low settings.  Keep going, upping the FFT size each time.’
This new project I started out first with a Hard Limit. Then I followed Bob's advise with managing by steps the FFT size.
Sample One is a piece of the original.
Sample Two is the results of the effects.
It sounds as though the speed of the vocals did changed - though one can listen to the vocal their conversation sounds - unnatural.
After removing noise is there another approach to redeem the vocals of those speaking?
Thanks!
Original Sample One
HardLimit - Noise Reduction Sample Two
Your video has been published at http://youtu.be/K63D5QNGb_I
Your video will be live at: http://youtu.be/uOtLUYiZyQc

Yes, you have very much overdone the Noise Reduction!
First, I'm not sure why you would need to first apply a "Hard Limit".
Second, are you sure you followed Bob's advice exactly, i.e taking a new noise sample and changing the FFT size on each pass?  Are you sure you set everything exactly correct on that first pass?

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