You should have titled this thread, "How Not to Ask for Help, and How Not to Respond", because the coach didn't ask the correct umpire, and the PU certainly screwed the pooch on this one.
Believe it or not, this situation is a mandatory "must ask" to get help in college play. NCAA Rule 15.4.3 says, "On a decision regarding a pick-off attempt, when asked by either coach, the base umpire must confer with his or her partner." No different than when the catcher asks the PU to go for help on a checked swing. The umpire has no choice.
So perhaps this PU was thinking he/she was working a college game, and knew his/her partner had to come to him/her for help. So he/she went ahead and gave that help from a distance to get the call right.
