My wife wishes to register to use the scales.

At present they are registered to my iPhone app. If I follow the instructions on Withings website for pairing multiple users, what happens is that the scales re-pair with SWMBO's phone and cease to recognise my phone!

As I understand it, the scales ought to be able to register with up to 8 users which can either be on the same account or different ones, depending on privacy requirements.

I've lodged a question with Withings support but wondered if anyone here had come across the issue?