Items in music location showing twice

[GilesM]

Hello,

I am a new user, and have a problem that only started this afternoon.
I have a Synology EDS14 running MinimSever.
The music is stored on a share on the server.
I use BubbleUPNP on an android tablet as a control point.

I went to move an album in the folder structure of the Music library.
Minimserver did not reflect the change on the BubbleUPNP so I reset the Android device and stopped then restarted Minimserver.
Now all albums are shown twice.
I have set Minimserver to do a rescan and await results, is there anything else I should do?
What is the correct procedure in the event of changes to the source files? Should Minimserver update automatically?

Any help is very much appreciated.