Marriage Index Find

On a whim, I started to search for Philias and Elzyre on the internet. Who knows? Maybe I'd luck out and find them in cemetery or church index.

I put in the search boisvert + duclos + lowell. BINGO!!! I came up with a marriage index page that looked promising. It was the Lowell Area Marriage Intensions for 1902. The entry read as follows:
Boisvert, Philas 28
Duclos, Aldea, 18
Date 25 Oct 1902

This was very curious! Philas was 10 years old than Elzire (aka Aldea). Was their a reason for the date discrepancy?