When creating a custom dynamic field with the "selection" field type, you must type the options in the exact order you want them to appear. If you want to add an additional option later in time but want the new option to be higher up in the list, you essentially have to delete/re-type all options in the exact order needed.

For example, if I want the selections/options to be alphabetized and I add an option the begins with an "a", I would need to delete and re-type all other options so that the new one is closer to the top.

Also, if you have a type or want to edit an option, you must delete the option and re-type it.

I'd like the ability to drag-and-drop options in order to re-arrange. It could also be helpful to be able to "edit" previously entered options.