Surely we have all ordered certificates hoping that the one we have ordered is the "right" one. Only to find when it turns up it was the other one we should have ordered. Surely you have ordered a specific certificate, given the right name & reference number, surely under the legaliities of "sale of goods" you have received exactly what you ordered. Not the GRO's fault that it is not the certificate you were hoping it would be, nor is it your fault. And even when the GRO still did the reference checking you could still get the wrong certificate if you ordered a certificate for John Smith, son of Fred Smith & Joan Jones as there could easily still be more than one (I know that this too happened to me, so who was to blame there?)
I know I have around 6 or 7 which are "wronguns". But never thought to worry, you makes your choice, pays your fee and hopes for the best.
If people were to now start returning certificates they have ordered using the correct details they have found on FreeBMD etc., and demanding a refund under "sale of goods act" then the next step the GRO would in all probability make would be to stop this service altogether and then where would we be.
I have twice tried to order specific certificates from Greenwich Registrars and they were unable to find either, yet when I got them from the GRO they were exactly what I required. Dates, names & district 100% correct, but Greenwich had been unable to find them.