Advertisments getting stretched to full width

Hi

In this link below, the ads seem to be getting stretched from 728 x 90 to full width.. what am I doing wrong..

https://fourplusmedia.staging.wpmudev.host/visionplusmag/fashion/trends/wheelpower-racing-ahead-with-eyewear/

They seem to be ok on the home page here..

https://fourplusmedia.staging.wpmudev.host/visionplusmag/

However on the home page, they seem to aligning to the left as you scroll below.. I tried to make them align center in the CSS but with no success.. please advise..

So basically 2 issues.. ad banners, stretching full width and not aligning to the center..

Thanks in advance

Regards,
Alim