duplicate links apparent between modules

Has anyone come across this - and better still, solved it?

I am linking two modules (using kitchen>links>create links by key) and find that in some cases I am seeing duplicate (2) links between certain object pairs.

1) if I look from the target end it shows the wrong number of links (2)

2) If I look from the source end it shows the correct number of links (1)

3) if I select the object in the target module and do Link>Edit Links, 2 (duplicate) links are seen. If I delete one of them, they both disappear

4) If I make the links and then save them (ie their absolute numbers) as a new attribute (using kitchen) and then rebuild new links by absolute number (link > link by attribute) I still get double links (so it’s not only the kitchen link builder which produces the problem)

I’m just using the Analysis>Wizard to display what’s on the end of the link

any ideas?
rogers - Thu Apr 15 09:20:47 EDT 2010