I agree with p!xeldealer 100%. You have no cause to be disappointed. I've had topos want to route me the wrong way on roundabouts [traffic circles] but I'd expect that sort of idiosyncrasy when using them for the wrong purpose. Horses for courses. You shouldn't expect a CN to be any good in the scrub on trails and you certainly shouldn't expect a topo to be any more than an emergency tool on-road even if it is 'routable'.