It is not obvious to me how Vuo works out where it will trigger an event(s) from with the Re-fire Event command. At different stages of building a composition I will see the animation of a firing event on a different node when I hit CMD+"T". COuld only find two mentions of Re-firing Event in the manual and this detail wasn't covered even in passing.
Second question, in my comp why does Re-firing update the line curve onscreen while the periodic event node firing to the refresh port of the same node (and a few others for good measure) doesn't change the data the line drawing node has?
First answer — Yes, as you figured out, Alastair (@usefuldesign), Re-Fire Event fires an event through the trigger port or input port that most recently had an event manually fired. (This is mentioned in the manual under Firing an event manually.)
Second answer — @Xavierdev already showed how to connect
Fire Periodically into the Fire port of
Build List to get the desired result. In fact there is no point to the refresh port on that particular node, since all of its output ports are triggers and the refresh port doesn't affect triggers. In Vuo 1.3 we're getting rid of the refresh port. It's superfluous on some nodes and we've heard that people generally find it more confusing than helpful.