I've tried that; it doesn't work, unfortunately. In fact, when I create other subpages for the same parent (e.g. [[User:WikiSysOp/Contact]]), it seems those too will just be pseudo-subpages - which is quite annoying... (While creating subpages for parents that didn't have pseudo-subpages before works just fine.)
Have you tried moving the main article (rather than the subpage) somewhere else as well? I'm not quite sure what order to move things in, but you might be able to trick it with some combination.