sanding between coats of interlux paint ?

I just painted the bottom of the hull on my WD12.  It took four thin coats to get a finish that I liked.

I sanded only small patches that were not smooth between coats. The rest got the next coat without sanding. It looks great.

Then I read on the can that you must sand between coats !!!

Will I have a problem with the paint bonding properly ?

Lou