This proves that Flynn was being monitored BEFORE the infamous Kislyak call on December 28-29, 2016.    It goes to the case that Flynn was being set-up. (Note that the Grenell list is only Nov - Dec '16 and Jan '17 -- it's very likely that he was monitored years prior too). Here's the Kislyak timeline: https://www.nytimes.com/interactive/2017/02/14/us/politics/flynn-call-russia-timeline.html