'.net gdi+' graphicspath. pathpoints() sloppy catch of pointers along specified path (addarc path)

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VB

GDI+

It seems to me that only those Pointers are seized within the

GraphicPath(AddArc).PathPoints()

which are necessary to complete the figure, but not the exact route. It looks like it is overriding the very next neighbour along the Path, without encapsulating it.
I am making a call to the Form.Text() Property every time in a For Loop Statement i add something to GraphicsPath(), displaying the amount of PathPoints(). The GraphicsPath is created New() every time, so no overloading is happening.
When i resized the Form just a little (Arc is anchored by code to fit), the amount of PathPoints() being 17, just increased up to 37.
What do you think?

What I have tried:

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