Oh.... Thanks for the report! I did check that page only a few days ago, so it must be very recently Google changed that. And I thought old Google Maps would work forever. But I guess I was wrong... I'll fix it during next week.
In the attached screendump you see that there was a launch in Meppel, but Meppel gets no Marker
The placing of the markers have some randomness added to them, so several events with the same coordinate don't end up on top of each other. (Some countries have so bad geodata that they all end up in the middle of the country.)
There is (more or less exactly) a one minute delay between the event and when it shows up, so you can test it.
The wicket-thingy is a flaw introduced when we made some changes to the download mechanism.