Hmmm.... weird. I'm using the General Finishes PolyAcrylic satin myself right now on a project. I love the stuff. I am also using it over an oil based stain with at least several days drying time. However, I almost always (as I did on this project) use a coat or two of a de-waxed, shellac based sanding sealer between the stain and finish coats. The sanding sealer (shellac and denatured alcohol in a 2" cut) helps completely seal any remaining open pores and eliminates any grain raising that you often times get with a water based finish. However, your issue doesn't sound like that kind of issue at all.
Sorry, I haven't been much help. If you happened to get your General Finishes product from a Rockler or Woodcraft retail store.... you could give them a call or take one of your chairs by and let them take a look. Kind of a PITA, but maybe another set of eyes might help way more than I did.
Last edited by JW_in_Indy; 01-16-2010 at 10:50 AM.