i totally agree with both... it is possibly that you have a nice little downswing but it is also very likely that you make a lot of mistakes... i thought after reading the beginner's section i'd mastered the game in no time^^ now that i've learned much more i see it very differently, i came a long way and there is still a lot of stuff i don't know or don't apply very well
for me it was a turning point when i realized i wasn't as good a player i thought i was...
but keep on improving your game and use the stuff that is provided or you can get your hands on: posting hands, (re-)reading articles, reading books (it might get you away from the SSS, but in the long term you should leave that strategy anyway :-))
i also like it to read the problems in the sample hands forum and i also post my thoughts... thinking about a hand from beginning to end (with a lot of time) is a very good thing
but keep on!