Flatten a sublist not working


#1

hi i am having trouble flattening a sublist I have no idea where these points are coming from, I just want the two sublists of two points each to become one sublist of 4 points each. What am I doing wrong? Thanks


#2

Not totally following what you want as the result. Isn’t that result a sublist of 4 points? Or do you want all the points to be in one list?