[Plugin: Random / Rotating Ads V2] Datafeedr Ad Rotator Ignoring Ad Groups?

After installing this plugin, I was noticing that ads from two separate Ad Groups were showing up in the same code declaration in my template. So that when I pasted the provided code into my template file for Ad Group One, the ads that showed up in that area were actually from both Ad Group One and Ad Group Two. This was a problem because both were different sizes.

I played around with a few things and what ended up seeming to fix it was removing the <iframe> from around the last ad in Ad Group One. Has anyone else had issues with using iframes with this plugin?