WordPress plugin update time wrong

Hi,

I’m managing the plugin “Events manager extended” (https://www.ads-software.com/extend/plugins/events-manager-extended/), and I did an update yesterday. But for some reason the “last updated” date indication on the wordpress page remains in 2010 (while the latest release was yesterday). Is this a bug in the release scripts at wordpress or so? Or do I need to indicate something in my readme.txt?

Franky