Invalid entries when using ABWQ only

Hi, 

Very odd problem happening at our customers site. Lync 2010 fully patched 

Lync client (2010) is displaying two instances of the mobile field.

First number is in format 07xxxxxxxxx

second number is in format +44(0)99 999999

The second number is the one that is in the AD and being pulled across 

I created a new client policy and changed the address book availbility to WebSearchOnly 

This then only displays the first incorrect number

Changing the clientpolicy to filedownloadonly results in both numbers being displayed again. 

So, I'm guessing that ABWQ is not updating properly for some reason? I can see no issues in the event logs. 

Thanks in advance