See attached.

There are two conflicting padding rules that seem to have changed positions in generated CSS?

One is body .plugin-setup-wizard .plugin-selector .plugins .plugin-select-controls and the other in @media screen and (min-width: 768px) { body .plugin-setup-wizard .plugin-selector .plugins .plugin-select-controls.

Disabling padding: 0 10px; in the inspector fixes it for me, having padding: 0 9em 0 14em; take over.