Currently multistamp/multiwatermark are applied in a fixed manner: the first page of the recipient PDF gets the first page of the multistamp/multiwatermark (1-1), 2-2, 3-3, and etc.
In certain scenarios it would be convenient to be able to arrange placement of multistamp/multiwatermark differently, for example: 1-x, 2-1, 3-2, etc. Or 1-x, 2-x, 3-1, 4-2, etc. To shift the beginning of multistamp/multiwatermark several pages.