If I'm understanding you correctly, are you able to use dynamic form rules based on your multi-select field to hide/show only the button that meets the form rule criteria? I had 25 different buttons, but I am only displaying 1 button on the form for the user to click based on the "Project Type" chosen. I have set up each button with the same label "Submit Project" so that the user doesn't even know any difference... as long as they choose the correct Project Type then the correct functions run and the correct records are added to the child table. Hope this helps!
