A form with delivery and payment questions should let someone answer both. Before rearranging its radio buttons, write those two questions on paper and list the permitted answers beneath each. This gives the repair a clear target independent of the visual arrangement.

Work on an Acrobat desktop practice form. Use fictional choices only, and keep a note of the existing names and settings before editing the authoring properties.

Give each question its own group

Radio buttons sharing a field name form one group; distinct export values identify mutually exclusive options. Use the name Delivery for Pickup and Courier, and Payment for Cash and Card. Selecting Courier must leave an existing Card answer intact.

Right-click a radio field to inspect its properties. Radio Button Choice identifies an option. The same-name, same-choice unison setting can make matching buttons select together; this differs from ordinary alternatives with different choices. Inspect that setting explicitly rather than assuming every duplicate behaves identically.

Exercise the questions in both directions

Prepare four test rows covering Pickup/Cash, Pickup/Card, Courier/Cash and Courier/Card. Enter each requested pair and record what remains selected after the second click. Repeat the exercise with payment answered first, so the test does not depend on one comfortable entry order.

If a row fails, identify the exact two controls involved and compare their recorded names and choice values. Do not repair all four controls at once without preserving which change addressed the failure.

Ask the form owner whether any repeated choice is intentional before removing it. A question that appears twice for convenience needs a different requirement from two unrelated questions that happen to offer similarly worded answers.

Keep the accepted group-and-choice inventory with the form revision. The result should explain what each question means and reproduce every intended pair, without relying on the distance between the buttons.

Sources: Adobe: field properties; Adobe: radio groups.