if it was fine prior then all of sudden is jacked up then i would do the following

check harness for any possiblity of harness issues....aka rodent chew marks, burned wires, shorted wires, broken wires

in OLSD you should be able to do anything you want with the tune with no interference of any sort from the pcm

o btw LC1s are junk!!! i wouldnt trust them for my life. ive seen to many fail and my old one personally was a full point off