Phantom Gutters / Broken Breakpoints


My design is full color background, but the published version has transparent gutters on either side of the design, viewed in mobile / landscape. Can anyone suggest a fix?

Also, probably related:

Viewing my design on mobile / landscape, I see my tablet design.

Viewing my design on mobile / portrait, I see my landscape design.

Can anyone offer insight into why this is happening, or how to resolve it?

Read-Only Prev: LINK

Published: LINK