I want to know this too, I happen to have the same problem.
I used this shortcode:
[matches league_id=2 match_day=14 show_match_day_selection=true show_team_selection=false]
I’m temporarily using last now to display the correct match day.
Using last WP with plugin version 4.0.3
I’d recommend you to try this: go to your stats and matches list. Don’t do anything, just click the button to update the results. In my case this solved the problem. Not sure what’s causing this to happen though.