Progress bar

Hi All, Can someone explain the way to handle this:-
In my survey flow i have same study running for 2 samples.
if Sample=1 (Survey)
if Sample=2 (Same survey without screener and slight differences).
I want progress bar to run independently for both sample as Sample is exclusive. Currently when i preview for Sample=2 it start from 50%, similarly for Sample=1 my progress bar not ends on even 100% completion