Trouble setting marker properties in chart through VBA

I am trying to control the marker properties in an excel chart, with each point in a single series taking on different properties.  However, it is choosing to ignore most of the settings that I tell it to use.  For example,  I have a scatter chart with a single point plotted on it.  Using the following code snippet, I can change color and size of the marker, but the style will not change.  When I query the proerties of the individual point, either through vba or the excel format window, it shows all values at automatic (as opposed to what I set, and what I see on the chart).  Why will the style not change to circle, and why do the property queries not match what I see or set?
very frustrated and confused....

    For Each bubble In Charts(1).SeriesCollection(1).Points
            With bubble
                .MarkerStyle = 8
                .MarkerForegroundColor = RGB(0, 0, 0)
                .MarkerBackgroundColorIndex = 8
                .MarkerSize = 52
            End With
    Next bubble



print charts(1).seriesCollection(1).points(1).markerstyle
-4105