Yeah that will complicate things.
I think to get warranty you would need to send them in as they are, and i'm not sure if the warranty applies internationally
So you would most likely have to send them back to the US factory if the dealer you bought them from is based there - add shipping to and from the factory (at your cost) and it may not be worth it.
I'd consider a remount a cm or so forward and then sliding the heeltrack back (depending how they were originally set up you should be able to adjust the heel 10+mm either way)
It's a tough call - not to mention that sending them in for warranty means you may not have skis for around 6 weeks
If you want to speak to the UK Distributor - it is Mastco Ltd. their number is +44 1539 621 762
And the Swiss distributor is PlanG GmbH, number: +41 55 412 8656
Maybe see what they say you should do about it..