Drop Down populated, value equals proxy field of related table, but isn't automatically updating

Hi,
In the relationship interface where you pull lookup fields from the Parent relation into the Child relation -- in the Child relation ( the right side ) you should have [Airport Name] as the proxy for [Related Airport]. Then, from the Parent side ( left side ) pull in lookup fields to the Child side. 

When you select Airport Name in the Request form, you can use the Record Picker option wherein you can specify three fields. One of them can be the ID# of the Airport Name ( Related Airport).

Add the lookup fields to the Request form. When you select your Airport Name, the lookup fields will auto-populate if there is information in the Airport table's records to pull. 

I'm unable to do that, may be because the requests is the many in the one to many relationship.

I have the name field from the airport table, [Airport - Name], as the proxy field of the [Related Airport].

I've even tried a dynamic form rule that would theoretically make [Airport - Name] equal the value in [Airport Name] which is natively on the Request table.

Yes, the relationship goes like this: Airports >> have many >> Requests. 

I'm a little confused about what it is you're not able to do. Can you elaborate on that some?

I think I figured it out somewhat... I think the reason I was attempting to make the [Airport Name] it's own field and update the lookup field [Airport - Name] is because when I try to just use the reference proxy field, it's using the standard record picker, instead of a drop down, even with me having it set to show as a drop down.