Event+ Navigation is skipping a month

I have a calendar page where I display upcoming events. I am using the shortcode [eab_calendar navigation="yes" footer="yes"] and the calendar is displaying for the current month (September). However, the first time I try to use the ">" navigation at the top or the bottom of the calendar, it skips over October and shows November. I have to use the "<" navigation to get to the correct month. It only does this when I first land on the page, the navigation buttons work fine after the first try. You can see the page at its temporary location: http://192.40.114.227/~journeys/calendar/