I am sorry you feel that way, @Tsesebe. I only stated the truth. You opened this thread with two closely related suggestions, both having to do with location of data fields. In post #3, you jumped to a perceived problem you said was about reconciling receipts and payments. You did not explain your workflow and used terminology that did not follow usage in the program. That made it very difficult to understand what your issue might be.
Sorry, but you certainly seemed to, but with terminology that did not really apply:
Now that you have furnished more information, however, I understand what you think is a problem. It really is unrelated to reconciliation, but with dividing bank transactions while keeping track of the total deposit or withdrawal. You previously raised this subject 3 years ago, and it is already in the ideas category: Editing a reconciled bank transaction (suggestion). Further discussion should occur there to avoid scattering discussion among several threads. (That is item c in your list.)
In the meanwhile, let me offer a suggestion. Put the total transaction amount into the summary-level description above the line items on the entry screen. When finished dividing the amount to post to various accounts, edit the description or leave it in place as you desire. There is no need for a custom field to use just for this purpose. And you will never have to scroll down to see it.
To answer your other questions:
a) No, custom fields cannot be repositioned on the Edit screen.
b) You cannot reposition the Out of balance field for journal entries. And the developer is not likely to for reasons already explained.