PayPlans is applying 100% discount on plan assignments?

Almost all of our members start on a trial plan, after which they transition to monthly billing. They sign up on the trial plan. Upon expiration of that plan the "Assign Plan" app automatically assigns them to their new monthly subscription. This all worked properly, except the first invoice has somehow had a 100% discount applied. If I click on one of the invoices, under modifiers it says "100% discount applied while assigning plan".

This was obviously not the desired or expected behavior. Part of the situation that is really frustrating me is that all of the documentation for all of these apps is gone. If I click any of the documentation links it takes me to the PayPlans product landing page. So I have no way to research this to find out if this is how the app is intended to function. I also have no way to figure out how I can resolve this situation. Somehow I need to create new transactions for these memberships - either by creating a transaction manually, or expiring all of the memberships now so that they auto-renew and pay.

Please help me figure out:

• How I can assign a plan after a trial and have it bill on the first invoice (and every time after)
  
• How I can immediately bill the users who have had 100% discounts applied on the first invoice of these plans