Toilets, Sinks, Showers, Tubs and Disposals - toilet problem

I have a toilet that was running quite a bit and the valve was leaking. I took the existing fill valve out and replaced it with the Fluidmaster 700A. I put that in fine and what was happening then was you could hear the fill valve come on once in a while for a second or two and then shut off. I am assuming it did this because you could hear water dripping through the flapper a bit. I pushed down on it and the dripping stopped. So I went and bought a new Fluidmaster flapper and put it in. Now everything seems good ( valve shuts off and there is no water dripping) however when you flush now it seems that it is using a lot more water then before. Once the water goes down in the bowl the water continues to swirl for a lot longer than before. When I open the tank cover almost all the water is being evacuated in the tank before it sucks the flapper down. With the old flapper only about half the tank level went down before the flapper closed, so it only took about 15 sec. or so to fill. Now it is double at least. I also adjusted the fill level so it doesn't fill so much but it is still a lot longer flush cycle. Sorry for the long post. Any thoughts.

Make sure the flapper chain is adjusted properly.too much slack or tension will impact how long it is open.Also check the flapper,especially some Fluidmaster models,and make sure it's hinge is functioning correctly and easily and that it isn't coming up so high it get's hung up by impacting the overflow tube.

A little plumbers grease on the pivot points sometimes helps if this is one of Fluidmaster's self contained versions that has it's own built in hinge point.I've seen those where the plastic tabs were not molded quite well enough for smooth operation.