Hello Virtuemart Community

Ok I'll try and explain my problem.
For each of my first level categories I'm using a Slideshow display, which is different for every category.
This works fine for the first four categories but then for the last 2 it just seems to select the mod for either cat two or three.
I've kinda got a feeling its something to do with the "multiple 'Itemid' issue" which I had on the top menu but used external linking method in the top menu instead of virtuemart menu.
http://forum.virtuemart.net/index.php?topic=72696.0Don't suppose anyone can point me in the right direction for a fix.
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here's what i've searched for in the forums
modules not showing on right category pages
module showing on wrong pages
module menu assignment isn't working
not quite sure what else to look for
