units ordered not matching sales ordered.

I’m having an issue on my dash board in the section that shows units ordered and sales ordered. The last two days the count has been off by 1 unit. For example, I sell my item at 36.99, I had 2 units ordered shown on the dashboard, but my the current sales at that time shows just $36.99 in total sales. Currently I’m at 10 units today, which should equate to $369.90, yet the sales ordered number equates to just 332.91 which is equal to just 9 units sold.. Anyone has any experience with this? This is the second day in a row the count is off by one and yesterday’s count not todays count has updated correctly.