Eh, it happens. I've been playing some with that bridge design page and its sorta fun, though it will occasionally accept bridge designs where part of the lattice is redundantly connected and part is flexible (as opposed to everything being non-redundantly rigid). Such cases can produce really bizarre nonsensical numbers.
It's also interesting, though, to observe the amount of mechanical advantage that's available even when one only puts objects on grid squares. Obviously if one puts objects at finer boundaries one can get really huge levels of mechanical advantage, but even when confined to grid squares the values are still pretty huge.
I clicked on the link to see what it looks like, but firefox gave me a blank page. LOL! I want to upgrade that, but I don’t want to lose my bookmarks.