when I have a short bow that has negative tiller, the arrow will hit my hand on release,,it the tiller is positive the arrow comes across without hitting, if you have a shelf,, the negative tiller could cause the arrow to hit the shelf, causing unwanted arrow flight,,alot of this depends on your release as well,,if I have too much pressure on my third finger the arrow flight is a bit high,,
short bows seem to be a bit more sensative to tuning, issues,,