double payment on re-mortgage

wotton_2

Have read message about this but isn't the same so I thought I'd post my query. Briefly we re-mortgaged with C&G from IF & despite my querying the risk of making a double payment thru a DD & redemption payment (because of the two dates being close together) no-one picked up that it would happen & it did. This occurred becos the DD went out 2 days before completion & the completion amount didn't take this into account. IF accept this is an overpayment & will return the money to us in 7-10 days time to allow DD to clear(!?) Now this happened to us before when changing from C&G to IF...we did get a 'sorry' cheque from C&G that time. But I would like to know how this occurs in these days of instant money transfers & e-conveyancing? I also wonder if it's another example of our money being worked on the money markets in a 'grey area' & so needs to be investigated?Any ideas please.