"On the very first line, somehow an extra 0x32 was written at the 12th byte that wasn't in the sdcc hex file. Is that normal?
"
SDCC (shorter form without "blanked device chars"):
:0400000002004F3279
:01000B0032C2

Programmer (full form include "blanked chars"):
:1000000002004F32FFFFFFFFFFFFFF32FFFFFFFF46

There is no problem with 0x32 at the 12th byte I believe It's only different listing type after flash loading to your programmer .

http://www.8052.com/tutintel.phtml

Vaclav