Searchable Dropdowns Combo Box

[nat90]

Happy Friday! I'm working on a Travel Reimbursement form (attached). I'm trying to get the address cells to show a short list of addresses once the user starts typing in the combo box. It works pretty well for the first one (I would like go be able to use down arrows or the tab key to go down the list). However, for the second combo box (different name), when I try and type in an address it only pulls up the first one I already entered in the box above it. I'm using the searchable list tab to make difference helper columns to come up with the short list. Any help would be appreciated!

Natalie