I played with the clock SWF's and find the some of the swf times are incorrect as well. At 5:30PM local, the SignageStudio preview show the Comic Clock at 5:20pm, but the SignagePlayer on a computer confirmed to have the same time shows 9:30. However the Flip-clock black is correct on SignageStudio and Signage Player.
Maybe the individual swf's can pick a time zone other thank local?
I hove no idea.
James