Number Range node returns nested list?

Hello all, following the official video tutorials, in the ‘Family by point’ videos, the tutor is using creating number ranges using code blocks method, I’ve done the same (and even tried many other methods) the problem is that it’s always returning nested (not flat) lists, which complicates the process when it’s always returning “flattened” information in the tutorial, did this change with the 8.1 version? Or do you think I’m doing something wrong in here? Thanks a lot!

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Actually, I just realized it’s coming all the way from the ‘select face’ node.
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