Sorry, my last post was poorly worded. I'll clarify. I was talking about those times when you think you found a hidden gem in a field at 12/1 on the ML and then the darned thing goes off at 8/5 at post time. Or when I use a 3/1 horse and it goes off at 1/5. Drives me nuts. You can adapt if it is the first race in the sequence, but if it's any other race in the sequence, you're stuck with it.
That said, the opposite happens from time to time as well. E.g., when you use a 4/1 shot and it ultimately goes off at 10/1 at post. But that kind of luck doesn't generally bounce my way.