Events Calendar not working properly

Hi there can anyone help me with my event calendar.

Any time I’m posting, the calendar won’t allow me to change the date on my post’s or page’s. Even when I am wanting to use or edit a widget I need to disable the plugin for the events calendar, then enable it again which can be a bit of a pain. I’ve recently noticed as well that my events are missing so I’m having to enter them all over again. Also compared to other event calendar’s I’ve noticed that I don’t have the option for the drop-down for yester years or months which is also a pain because that means you have to keep clicking forward or backward through the months until you get the month you require.

Btw i’m using a woo theme if that makes any difference.

http://www.bandparades.co.uk/events/

Any help would be great, thanks in advance.

Apologies for posting in the wrong place the first time.