My neighbour has a Nokia Lumia 520 and accidentally linked an existing contact ("Person A") with a new contact that he created ("Person B").
This has had some side-effect where Windows Phone seemed to get confused about text messages associated with Person A (the original contact). If he goes into the text message app, then it shows Person A's text messages under the name of Person B. If he goes into Person A's profile and selects the "Text" option, then nothing shows up at all.
To try and solve this, we deleted the "Person B" contact, and the text message app now shows the correct name on the existing message threads. However, when going via the profile, it still shows up as there being no messages.
Does anyone know how to fix up the contacts so that the existing text messages are correctly associated with the original contact again?