The Show Modal button has the interaction "Open modal-target" but it cannot target the second style of the Modal (e.g. "modal-target") because the second style will not appear in the dropdown list for "Affect different element". You need to create some dummy element with the first style = "modal-target", and then delete the dummy element, just to make "modal-target" appear as a valid entry in the list for "Affect different element". This is a ridiculous workaround. That dropdown list should be populated with any style, and not just the first style, irregardless of the order in which styles are applied to elements.
Show Modal