Hi,
According to your post, my understanding is that you wanted to change the column order in dispform/newform.
I had tested with the above thread that you posted, it still applied to the SharePoint 2013 list.
You can check with the following steps.
List Settings->Advanced settings->select
Yes in Allow management of content types->Ok.
In the Content Type, click Item->Column order->change the order of the column.
You can also recreate a new list, then check whether it worked, maybe the list had already corrupted.
Thanks & Regards,
Jason
Jason Guo
TechNet Community Support
