Multiple copies of email appearing in Apple Mail

Question

Suddenly I am starting to see multiple copies of an email in me Apple mail client.
This seems to have started when I did the software upgrade earlier today - although I have no idea if this is a coincidence, or part of the problem.
fyi I am using Apple mail with a Google App mail account. This has worked perfectly for a number of years until today. When I look in my gmail account using the web client there is only one copy of the email.
Any ideas?

Answer 1

In general iTunes is slightly more liberal when it comes to spelling than the iPod. As the iPod enumerates the tracks it will see each different spelling as a new artist so it may list one album multiple times. The iPod also takes no account of the Album Artist field so tracks with guest artists may also be viewed as separate albums. Disk No. & No. of disks may also affect the order in which tracks are enumerated or grouped. For a given album the following terms should all have exactly the same values. Album Title, Artist (except for Compilations), No. of Tracks, No. of Discs. & Part of a Compilation. The Sort Artist & Sort Album fields take precedence over Artist & Album and, if used, should either have the same values for all tracks, or match with the existing values for Artist & Album on other tracks.
Normally selecting all the tracks from the album and overtyping the Album, Artist & Album Artist info. is enough to fix this issue, although once I had some weird extended character that refused to be replaced in certain tracks. In this case the answer was simply to add some random info. into each field, e.g. add X onto each value, apply the changes, then remove the excess text & reapply.
tt2