Check your Sort option on the Setup panel, and check to make sure that your data source recognizes your months as dates and not just text. You’ll need to make sure the Months are of type Date (Month) and that your sort is by Month (ascending). It looks like your sort is probably by Booked Revenue (descending).
If that doesn’t help, please share a screen shot of how you have your Dimension, Metric, and Sort on the Setup tab of the chart and we can try to help more.