You need to adjust the blocks in the mobile version of the landing pages and save the changes.
You will find an icon in the left pane for the mobile version of the landing page, please turn it "ON" and click on the mobile icon to adjust the blocks. Please check the screenshot
If any block gets changed in the desktop version after making changes in the mobile version please turn off "Desktop. Please check the screenshot below. Once you turn off, the block disappears from the desktop version. You can add the same block in the desktop version and turn off "Mobile".