Board Thread:Support Requests - Community Management/@comment-1755931-20150925130752/@comment-168424-20150925183710

Be careful using more than one account as it could be viewed as a terms of use violation.

As for editing mobile content, you can mostly only control the front page with Special:CuratedContent. You can also convert infoboxes to the portable infobox style to improve how they look on mobile. To improve other mobile content is more of a hand edit experimental process.