The manual does warn: [quote:i3kluqiv]The actions in the Manipulation category (e.g. Push, Pop) allow one-dimensional arrays to be used like other data structures. (These actions work with multidimensional arrays, but are intended for the one-dimensional case.)
I wouldn't use the push/insert operations on a multi-dimensional array. This example just sets them explicitly. You may want to use a dictionary, to index by name.