Hi jb,
Unfortunately, because we can only be exact down to a 1/2" there are going to be some places where the grid gives you a funky read. Usually when you are seeing a read like that it means the ground is relatively flat. As a player I used to disregard the break in most of those instances, hit it straight and just logged the result in the ol' noggin for next time. Call it the rub of the green if you will. Being familiar with the greens gives you the advantage there, just like the pros. =)
I'll never be able to get to the exact same spot you were in, so next time you see a contradictory read on any green please right-click in game and send us a bug report describing the issue. Your "coordinates" often go out 7 or 8 places AFTER the decimal point and this is need to know info when we are looking for things like this.