i quit and hours cut from 5.97 to 5.15 is this legal

i quit my jobs because of difficulties with my manger. she didnt accept my notice of only 9 days. she would only take the full 14. she told me she was cutting my pay to 5.15 if i gave the notice. i couldnt give the full 14 because my second employer hired me on 10/20/2004 for night shift. my old employer wouldn't move me to day shift so i really couldn't make the full 14 days. i gave her the 9 in writing on 10/20/2004 and she said my pervious hours and hours after wards would be cut. i decided that i would not work for 5.15 an HR when i had been paid 5.97. my pay period went from 10/13/2004 until 10/26/2004. the pervious days before quitting that i had i worked were cut to 5.15 an hr. can she legally do that. she claims i signed a contract with the company it was my 1st job and she forced me into signing it and said i couldn't work without signing it. can she really cut the hours i had already worked at 5.97 because i quit.
thanks for your help Sarah wilson