Multiple tooltips in a graph with multiple series

I have several questions about extjs 4 graphs. I will ask about 2 of them.

1. Most of the time, whenever mouse pointer is near the line chart data point (node) it gets highlighted.

And if you have nodes close to each other, once you hover over one node it highlights the one next to it. I am not sure why this is happening, but this is confusing when there is a tooltip or node click event. In the picture below you can see cursor position indicated by vertical line and the highlighted node which is about quarter of an inch left to it

1.png

2. If I have more than 1 series. How is it possible to show multiple tooltips based on the x position of your mouse cursor? Or maybe just one that has info about all the series?

Thnaks