interesting that you brought this up. Both my friend and I's compaign page links got hijacked as well. Good thing my friend caught it in time.
If you are duplicating someone else's webpage then creating your own links within it, you run the risk of the original code being modified so that all your campaign links can redirect to whoever the controlling person wants them directed to. In our case, our links to our affiliate product offers were being secretly being redirected to another person's affiliate network's referal link for the same exact product. How they're able to do this? I have no clue whatsoever.
Sneaky. We were wondering why we were pulling tons of traffic but no conversions on a previously very high converting product. The only way we were able to catch it was by utilizing ccleaner (to get rid of any cached content) then going to our page and clicking on our links and looking in the bottom bar and being able to see the true referal link for a split second. We noticed our leads were being redirected to another affiliate network for the same exact product.
I would like to kill the individuals who did it, but just a little headsup...if you're noticing suspicious activities on your campaign stats, there's a good chance your links have been hijacked...