Hi @Anna,
Mark provided great insight above on what are most likely the underlying issue you are seeing! By default, the Collecting Trip query combo box is configured to use the CollectingTripForm view definition rather than the CollectingTrip one.
When looking to edit a particular form, I recommend going to the “Form Meta” menu via the gear (
) button in the top right of any form.
See here:
This will bring you directly to the view definition you are looking to edit based on what the current logged in user will see!
If you’re already editing forms, you can actually go directly to the appropriate view definition by opening the dialog from the editor and clicking the pencil (
) icon in the top right where the meta menu would usually be displayed: