Thanks
[SOLUTION] Just putting this here since the nutty auto stretch still happens by default in FL20, but nucleon posted the solution:
(not sure if theres a way to lock the thread)Try turning off 'read sample tempo information' in general settings.
That auto stretches audio when you bring it to the playlist.
For your current audio double click the clip, right click the time knob on the timestretch panel and select none.
Also turn off 'stretch' on the audio clip focus tab if not needed.