The stats are 1 in 5 for re-marriages, so it's "normal" enough, just not typical of the majority, IMO. Even then, those stats are lacking. They only take into account actual divorces and remarriages on record, as there's no way to peg those that never get divorced and reconcile, those that get divorced and reconcile but do not remarry, and those that weren't married in the first place though were in a committed relationship.
It's also not usual that most people in our LBS circumstances decide that the relationship is worth our DBing and instead resort to their instincts and engage in anger and resentment and stay there through a terrible fight of a divorce and remain antagonistic to their former lovers, thereby never seeking a path to reconciliation. So I've often thought that the 20% that do remarry, and those uncounted that do reconcile, come from that group of people like us.