Child - The First Shall Be Last?

When I execute the following code:

set inbox to row named "Inbox" of fuzzyStuff
set newRow to make new row at end of children of inbox with properties {topic:rText}

newRow gets added as the first child of inbox, rather than as the last child.
(I tried “move newRow to end of children of inbox” and that left it as the first child. I also tried first.)

Why? And how do I make it be the last.

set inbox to row named "Inbox" of fuzzyStuff
set newRow to make new row with properties {topic:rText} at end  of inbox 

This adds the new row after the last child

Frederiko