Thanks for raising this question on managing your mobile and desktop sites. I presume you're on Jive Cloud, so please confirm if you're on a different version. To edit your community's mobile site, please reference:
Unfortunately, the mobile site is separate from the desktop site, so these cannot be edited together. Managing your desktop site will depend on how you have it configured. Please refer to:
On your second question on about content shifting off the page, I would recommend posting a separate question to help make it easier to follow the thread. However, it sounds like you may need direct troubleshooting assistance for this, so please submit a support case in your private Jive Community customer group and provide:
- Include a screenshot of what the users are seeing.
- Confirm if this is happening on the mobile app (native) or mobile browser?
- Provide detailed steps to reproduce the issue.
Once the case has been submitted, a team member will review this and reach out to you to provide guidance.
I hope this helps. Let me know if you had any other questions on this.