Curious on what this means...

I made a cream ale from a kit about three weeks back. the first week after pitching the yeast was very active. they rock and rolled for about a week before the airlock showed no more. Instead of moving to primary to secondary like i intended i have put it off for a couple weeks. I decided yesterday to move to secondary, opened up the closet and i notice the airlock is showing a little pressure. what does it mean when it goes from showing nothing to something in the airlock?

just releasing co2 from solution.

i was thinking that when it was finished it should be ready for bottling or keg.

It's probably still fermenting. Two weeks in primary really isn't long enuff. Take a gravity reading, then take one again tomorrow and if they're the same and at FG, then rack to secondary. Don't rack to secondary before FG is reached. Don't use an airlock as a device to measure fermentation. Only a hydrometer can tell you if your beers ready to move.