No, it's not unusual for Dad to be right. It's just unusual for him to be right about the pronunciation of a word as opposed to Mom.

The word was "Esther." Ya know, like the name or the book of the Bible.

How would you pronounce it:
Es - ter or Es - ther?

We were shocked when Dad looked it up in the dictionary and saw that the correct pronunciation is indeed "Es - ter." I've been saying "Es - ther" ever since I can remember and have been convinced that that's the right way to say it. I was wrong this time.