copy and restore OE6 messages duplicated

  Carafaraday 11:05 21 Nov 2009

I frequently copy my email messages from pc to laptop and have never had this problem before but today all messages are appearing in duplicate and if I repeat the restore, I end up with 4 of each message! So I have two problems - firstly the messages get copied twice and secondly they do not overwrite the existing messages in the various folders. I see that there are various applications on offer which will hunt out and delete duplicate files but would really like to understand what is happening and how I can prevent it.
Thanks to anyone who can help.

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