Page numbering in sidebar

I am trying to number static pages in the sidebar using the Pagemash plugin, but the pages are being reordered by digit such as 1, 10, 11, 12 … 19, 2, 20, 21 etc… instead of numerically as 1, 2, 3, 4, 5, … 9, 10, 11.

I know adding digit placeholders will fix the problem, but it would look like hell. How can I get WP to disregard the numerical sort order altogether?

P.s. adding additional characters such as -1- or (1) do not fix the problem.