I’m not sure where to post this exactly I just wanted to save somebody else the hassle because I couldn’t find the solution online and it cost me half an hour.
If you increment a variable in a flow, and want to log it to the timeline afterwards, it’s not enough to add the “log to timeline” card after the logic calculation card, you also need to wait a second.
See this screenshot (I’m counting diaper changes per day 
)
I was always assuming that the cards were processed sequentially, apparently that’s not the case.
