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You can switch your datasets so your dataset with the 2 points is first in the array.
Or you can add the order
property in both datasets which takes a number, the higher this number the sooner that dataset gets drawn. So you will need to assign your dataset with the 2 points an order of 0 and the other an order of 1.
For more information about this you can read this part of the docs
Source:stackexchange.com