Do you use new filter socks or are these ones you have cleaned?
I've had that problem with new socks or poly-type pads, and it just seems to work itself out after a couple days. I clean my old filter socks in the washer, and old ones don't do it. I guess it's a byproduct of the manufacturing process.
It is a violation of federal law to use this product in a manner inconsistent with its labelling.