[Plugin: Events Manager] Weird Date/Calendar Issue

I’ve got a weird issue on a site I manage:

1) The calendar widget shows May
2) The main listing page shows the calendar for February
3) A listing page for one category shows events from February and May as upcoming events (non for April in between).

and here’s where it gets odd

– It doesn’t do it for me when I’m logged in
– It does it for non-logged in users and another admin
— but if that admin updates any event at all, it “fixes” itself for that admin and shows everything from May only.

I have a feeling this is to do with one specific recurring event that was set to happen on 4 days in February as the category listing shows the last 3 occurrences of that event + the 3 upcoming from May.

Very odd issue that’s driving me mad!

TIA

http://wordpress.org/extend/plugins/events-manager/