The month on the X axis is not in calender order.
That doesn't seem to work. I have tried filtering it by the month, and does not make a difference. Is there a setting that would allow us to change this order, or a formula in beast mode that may work?
make sure the date field your using is loaded as a date or datetime data type. Also, i would sort the chart by the date field to make sure it stays in order.
Sounds like the date value you are uising is not a Date data type. You have couple of options: