Membership upgrade is not working for me. Please see my website scenario below.
1) There is a free registration enabled.
2) 3 Dripped content membership and they are trial(free), monthly and yearly.
3) When your signs up the default membership assigned is trial.
The problem with this is if I go to subscription page, it shows current subscription information which is Trial and list of other subscription available. But its doesn't show upgrade or signup button even though I have setup Upgrades period limit to 1 day.