Yeah, we felt like monks had too many short duration non-instant spells, it made them less effective than they might appear on first glance. 1 rnd/lvl is appropriate for instant spells, but monks will tend to be use their instantaneous actions for adrenal defense. 1 min/lvl gives a little more opportunity to cast those spells before combat starts and have them not run out halfway through.
It looks like the higher level spells got out of line during layout and we didn't catch it at that point. The intention is they should all be 1 min/lvl now.