I set my BubbleSeries MinSize to 2.0f and MaxSize to 2.5f, then add a bubble with size 2.0, but it shows up with a bigger size 2.5 if it is the only one bubble in the series. If there are different size bubbles in the series, all of them show up with proper size. How to let the bubble shows up with correct size if ...

We can contol a bubble color by setting FillEffect when adding a new buble to bubbleSeries. Is there a way to change a bubble's color after it has been added to a bubbleSeries? Thank you a lot,