Difficult to debug this sort of thing from a picture. It would be better if you upload a sample Excel file to the forum.

XY scatter + bar combination charts are common, so I see no reason why you cannot combine a scatter + bar chart (see this tutorial for an example of combining bar + scatter: http://peltiertech.com/Excel/Charts/BarLineCombo.html ). I would guess it has something to do with the series definition. I know sometimes it makes a difference what order you create the chart. Have you tried creating the bar chart first, then add the scatter chart series to that? From a picture, we can only guess.