this is at work, chrome Version 41.0.2272.101 m
I7 3770 CPU w/ 16gigs of ram
I did a little bit of testing too, and im not able to replicate the light not moving with the token now, but I am getting issues with turning it off and on - its not related to there being more than one flicker.
I have 3 tokens set
token a - flicker-on 60 30 -> creates light at token a
token b - flicker-on 60 30 -> creates light at token b
token a - flicker-off -> turns light off (and moves a flicker token to the top left of screen)
token a - flicker-on 60 30 -> nothing happens
token c - flicker-on 60 30 -> creates light at token c
(manually delete flicker token at top left)
token a - flicker-on 60 30 -> creates light at token a
so basically once a token has a flicker turned off, it can't be turned back on unless the gm finds and manually deletes the old flicker token
with testing, it does let you change the light of a flicker that is currently on (i was able to change a token to 60 30, 10 5, and back to 60 30 with no issue)