We are not using Ext js. I get the same behavior, even when I comment out the onShapeMouseEnter and onReset events. So, it isn't related to those, but here is the code.
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I pasted your $("#map").kendoMap example into my page, and the one thing that is consistent is that when I scroll on the map, it moves to Africa, just like it does in my example.
When the map first comes up, scrolling doesn't throw any errors. Once I load in a couple of data points, they are thrown into the upper left corner of the map. If I scroll, at this point, I will see the errors. If I move the map so that the dots are towards the middle I see that the dots are just a quarter of a circle, until I let go of the map after moving it with the mouse. When I let go of the mouse, the 1/4 circle becomes a whole circle and I don't get the scroll error anymore.
If you look at my other open issue in the Map Forums, you will see the history there and I am pretty sure these two issues are related. From what I have seen with other people's similar errors, it seems to be related to something with the data points on the map. For me, all of my dots on the map go to the same place, even though their lat and long coordinates should put them somewhere else. I think if we can figure out the data point issue, this other issue will go away.