coolant in plug valleys after HG replacement

coolant in spark plug valleys:
I just did the dreaded head gasket replacement on my N/A.....not usual on a N/A, but nevertheless, it's done and was running fine for about 200 miles when cylinders starting misfiring. I pulled the No. 6 plug wire and there was a little bit of coolant in the plug hole with the plug. I pulled the No. 5, same deal. So, i pulled both plugs, dried everything out, cleaned off the sprk plugs and reinstalled. The car runs great now, but what's the deal? Did i miss something or not tighten something correctly during the HG replacement? I'm anal and did everything by the book and talked to 3 mechanics during the process, so what's up? Anybody have an idea?

was it just the back two? or all of them?

check the heater hoses to make sure they arent sprayin coolant into the plug valley.. But its probably coolant leaking through the coolant plugs.. there are 2 spark plugs in each chamber, and inbetween each spark plug, theres a coolant plug (14mm allen head) the coolant is probably coming in from there.. Read this, should help

http://www.cygnusx1.net/supra/techtip/headcoolantleak.html