T3I takes 1 shots and gives 2 files ( cr2 and JPG ) ... why ?

[Me]

The subject says it all .

And by the way .... Just LOOOOOOOVE Magic Lantern . Thanks to all the good people who found a way to help Canon and DSLR's to acheive such hights .

Thanks again guys .

[Walter Schulz]

Because you told the camera to do so.
http://gdlp01.c-wss.com/gds/0/0300004720/02/eosrt3i-eos600d-im2-c-en.pdf
Pages 20 and 76.

[Me]

Great big thanks ... and happy it ain't ML but little'O'Me .

Thanks again Walter Schulz .