Making doubly sure?

Still plugging away on the DAWE families of Sth West Devon, many descendants of whom are descendants of my KING and BARTER ancestors.
Many of the KING/BARTER rellies have now been better documented as a result of this exercise, which has highlighted, yet again, how inter-related many of these families are!

Today's intriguing find is a couple who appear to have married twice within a month - and no it doesn't look like banns in both parishes.

Mary Maria Pitt GILES and William SPURRELL are indexed as marrying in Devonport, with the FindMyPast transcription showing this was 22 Oct 1913 at St John's.
FamilySearch has the image of a marriage licence in Cook Co., Illinois of a 36 yr old William SPURRELL of Chicago marrying a 33 yrs Mary Maria Pitt GILES on 11th Nov 1913!
In between there's an passenger list into Montreal on 5th Nov 1913 showing William, 36, and Mary,  33, as SPURRELL, both "married", with William's children, William and Joseph, from his prior marriage (which children are with their grandparents in Wembury in the 1911 census).