Client has overpayment of SDP as partner moved in on 26/02/2015.

Original overpayment decision started from 26/02/2015 (date she moved in)

Client sought MR re certain issues.

Decision now is that overpayment started from 20/02/2015 as this was “the beginning of the benefit week affected by change”

Is this correct decision???
http://dlvr.it/RfP0xY