Forms :: Cannot Get Edit Access In Popup (Confirmation) Form

I am designing a transactions database for some of my clerical staff. I've inserted a data entry subform into the main transactions form (which also has a subform that summarizes all the selected company's past transactions). This data entry subform actually has as it's record source a table that simply stores that one record temporarily.

So when the user is finished entering their current transaction, I have a Save button that actually just opens a popup form which displays the data they entered into the data entry subform, giving them a chance to verify their entry is accurate. This form has a Save button which runs an append query and a delete query, adding the record to the permanent Transacations table and also clearing the temp table.

The problem I have, I think, is that when the popup form opens, the main form data entry subform still has that record locked as exclusive. I believe this is the case because while I am indeed able to make changes to the fields on the popup form, none of these changes appear in the temp table. In other words, the user is not actually able to use the confirmation pop up form to make any necessary edits to their entry. This makes the form sort of useless!