Throw your Schirmer copy of the études (and copies of anything else) into the nearest fire or river, and buy an edition with some kind of credibility.The the études of Chopin, I recommend either the PWM edition, edited by Jan Ekier...or Henle Verlag, edited by Ewald Zimmermann.
Pedal markings, like fingerings, are rarely original instructions, and are almost never universal. Whatever markings are in your book will probably sound wonderful on some pianos and horrid on others. The issue with "adherence to the score" as a general concept is that music is not a prescriptive art form but a descriptive one. The function of a score is a means by which the music can be realized, not as an end in and of itself. Your pedal markings and fingerings are more than likely added by an editor, which, while not meaningless, is still only a tool and not an end in and of itself. I would encourage you (and I say this to *all* classical musicians) to analyze your scores and ask WHY certain things are there. Lifting the pedal each bar because the music says so is not a good enough reason. The quality of the music you produce is the only, and I repeat, the ONLY thing that matters.