PPC Ads (Push) cannibalization and creatives testing

[tompon]

Hi guys, I have a question - when I run my campaign on Propeller (for example) and have 2 exactly the same targeted campaigns (because I want to test more creatives than 10), do they cannibalize each other?

I mean if they compete with each other for click or display and because of that, the price for CPC or CPM is higher.

If so, how to avoid it?

Thank