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I already have prev and next , relation included ..

but then i get so many notices in SEOMOZ, any idea why is that 
I know it may not be very important, I just want to understand WHY ?

rel-can.jpg

I have a site where we have search and result pages, google webmaster tool was giving me duplicate content error for page 1 / 2 / 3 etc etc

so i have added canonical on these pages like http://www.business2sell.com/businesses/california/

Is this is correct way of using canonical ?