My website has 3 zones (A,B and C). I have only one campaign and I want smooth delivery of impressions for period of time. I want to have on site all three banners from campaign in same time. I set companion positioning and it works. My problem is, that this works only when campaign is remnant. When I set contract campaign (so campaign displays for example 1 of 3 times) , sometimes it display only one of banners, sometimes two and sometimes three. Problem is, that I need allways all three, or none. Is there any way I can solve this?