Hello,
unfortunately the linear correation node doesnt have a functionality to reshap the appearance of the correlation matrix. The only way is to resort columns before the linear correlation node manually. However, if columns are resorted they do not appear in different order in the column selection GUI. And infact the order of the columns stays the same, but the values of the matix are resorted leading to a wrong display. Only if the nodes are disconnected and reconnected the resorted table is updated. E.g. GUI of Splitter updates resorted columns right away. I attached a screen shot: the right matix is the original table, in the left one I have resorted columns 2 and 3. I guess that's a bug.
Best,
Martin