I think the issue is with the word "Missed", we should see something like "Spell Failed" and/or "Spell Deflected". Magic shouldn't be 100% all the time. I always liked the magic system in the Old Wizardry series, the higher the level or more difficult the spell, the greater chance of failure, sometimes a spell would blow up in your own face and damage your party members, magic is a dangerous thing! Cell pones, cars, guns jam etc. nothing works 100% of the time, you've just been spoiled!