Ditto x4 looper dual mono with 2 instruments set-up

Ditto x4 looper dual mono with 2 instruments set-up

i have a question
according to the ditto 4x looper manual it says i can run one instrument thru the left input and our the left output while running another instrument thru the right input then out the right output, each of these  out puts then goes into seperate amps for each

i tried doing this

but when i record loops with the left instrument i get the looped signal on both, left and right channel outputs

please help ive tried everything i can seem to make it work! please help

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Source: http://forum.tcelectronic.com