yeah, centermarks are a little erratic.
try selecting further down on the centermark i.e. towards the end or tip of cross.
i've experienced it too and it's annoying as ____
I agree with kenneth centermarks have been problematic for years.
Usually if you select the hole edge to dimension to the extension line starts a fixed distance away from the hole center, like the middle two examples in your image. A better method is to dimension to the centermark, then it will appear like the first hole. I don't know why the fourth hole extension line is like that.