In the survey distribution tool, I see my forms in a scroll-down list (two arms each containing 1 form with two events, so four options in total). When I click on a form in Arm 2, the 'add participants' button is disabled, and a message says to add participants to the initial form. Thus I added the participants in the initial form (even though they won't be completing it), but I don't see the option to assign them to the second arm.

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