Help with a Peerless SLS 8

I am having trouble with my Peerless SLS 8 for my 3 way. I have taken actual theile small parameters using REW. When I enter those into WINISD I always end up with a weird hump. Stock parameters for the Peerless SLS 8 is dead flat. I will show the parameters, the graphs, and the box.

Does someone know of anything I can do to fix this? I planned on crossing it over at 300hz but I fear I will end up with an odd dip between 80-200 hz.
Stock line is red, actual measured theile paramters is pink.
 

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I ran it for 20 hours of pink noise and sweeps. Maybe I need to to turn the volume up and break it in more
I did use an Sd of 213 because that is what Peerless states in the specifications. Why should I be using 203? Where did you get that spec from? The actual measurement of the cone? I know the surround is supposed to be part of the cone to some extend on woofers of this type.
 
Booger, I used a tang w5 in another three way and ended up with something similar to your but farrrrr worse. I will have to rebuild that cabinet because of it. Next go around I will be measuring the Theile parameters myself now that I have the equipment. Their stated parameters must be way off