You need to do more with teh settings.
IF I remember correctly a lot of the stuff in the presets was per_peixel stuff that would make it appear a bit locked in.
Try and start from a blank canvas (I know it sounds like a lot of work) but that way you will start to learn what can be done.
There is a hideous outdated guide on my website but following the steps will let to a better understans. The preset you choose to remix if pretty comlex really.