A double wedding puzzler

This week I came across an example of a couple who married twice. The first time they married in the groom’s home parish, then three weeks later they married again in the bride’s home parish. The banns for the second marriage must have been called for the first time the day after the first marriage.

Did the couple marry in secret the first time, then her family insisted on witnessing a marriage themselves? Or perhaps the couple didn’t have the courage to admit they had already married and so had to go through a pretence of not being married to please the bride’s family?

Evidence points to one of the witnesses for the first marriage being only 15 years old. Maybe it was discovered that he was underage and another marriage was held to ensure legality? However, certificates were issued for both marriages.