C and S coefficients in wavedec2 function

Hi when i use wavedec2 function on a image of 32x32, c=1x1591 elements but how come this is possible?I have one 32x32 elements in my input image=1024 coefficients, so from where other coeffients came? please explain. Now if i select first 8x8 elements from 32x32 input matrix and convert it into row vector, why they are not same as first 64 elements in 'c' coefficient of wavedec2 function, as pointed by 's' coefficient of wavedec2?