Yeah, it looks like I signed off on the card for this change (
https://trello.com/c/65fIifaP/40-bug-69487-special-mobileoptions-checkboxes-are-confusing) on Sept. 23rd, which means the changes went live on the first week of October.
We should probably investigate what the usability issue is with this. I suspect it might be the combo of height of the checkboxes and the relative smallness of the save button at the bottom of the page – since the checkboxes take up the full screen on most phones, even the longer new iPhones, people probably aren't getting to/using the save button.