Odd postcode search results with Active 10 Plus

[axys]

I bought a Satmap Plus a few days ago I'm using the Go To Postcode feature to find various points around the UK I want to be able to jump to quickly from my POI's. I'm doing 'Go To Postcode' and when found Creating a New POI. However, the last two postcodes entered have gone to the wrong places!
LS3 1JU goes to Luton
LS4 2SL goes to Glasgow
Both of these should go to Leeds. I've tried several times, shut down and restarted but the results are the same. A third Leeds address is fine. Has anyone else had problems with this (new) feature? I've also emailed SatMap (but had no reply a week on).

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