Why ARX file run code often change!

Thx first.
but which Debug software can see the same code in hex and Debug code.
i use Softice and TR can see same code , but I cant find the code in .arx
file. Engneer not same can make no same result . perhaps say asm code , can it change hex code?
because file a lot , not one ,two ..... file patch to resolve problem .

Anybody can tell me result?

Thx again.