Hey guys. I only play mixes on my station.  Lets say I have 36 hours of mixes and my playlist is set to play in order. Will it go through all the 36 hours of mixes or restart back to the first mix after 24 hours?

I think if you won't set anything special like interrupting playlist after specific time, playlist should play all tracks and then start to play from the beginnig.

Simply, yes. If you have 36 hours of sets (mixes) in playlist playing in order it should play them all for 36 hours