Ensure profile doesn't enter flow twice?

So according to Klaviyo documentation, a profile can only enter a list triggered flow once. I’ve built a new, fairly large welcome flow as I’m consolidating multiple lists into one, and this flow has splits based on where/how someone enrolls in the list, which are:

• Form 1
• Form 2
• Back in stock
• Checkout

I just want to be sure there is nothing else that needs to be done to prevent someone getting the welcome flow twice if they sign up via Form 1 for a discount, then checking yes to subscribe again at checkout? I think I’m safe since the trigger is still subscribing to the one single list.