your output (however you got it) is correct.

a "color"
... is an int 
... is 32 bit
... is 4*8 bit = 4 byte
... can store: alpha(8 bit), red (8 bit), green (8 bit), blue (8 bit)


the color components are saved like this:

11111111 00000111 00000000 00000000
      |                  |                 |                   |
 alpha          red           green           blue
  (255)           (7)               (0)              (0)

I follow what you say, I started with r,g,b,a and it saved as a,r,g,b ( i.e. the alpha is placed at the other end.

Sounds good to me; there is always a good reason for everything.