From GM Amittai on the homecoming Discord:
"Weekly Strike Targets change at Midnight UTC on Monday (what a lot of people generally think of as Sunday night), which was 6h48m ago as of this moment - your start time was 1:53AM GMT, nearly 2 hours after the Weekly Strike Target changed, and was completed at 5:58AM GMT, just under 6 hours after the change. If the LFG tool was still showing Explorers and Exploiters as the WST when you began, that's an error carried over from the Live schedule and we'll report it to our dev team so they can hopefully implement a fix to prevent any further confusion. You can visit https://forums.homecomingservers.com/index.php/topic,1398.0.html to see the dates that WST targets change through the week of 4 Nov. We apologize for the confusion on this matter; I know it can be frustrating to not get the reward you were expecting."
Okay, so it DOES go by server time and the live visual is a UI bug.