For some reason, of I comment on the first page of a multi pages thread, it automatically double posts the message. Happened twice on my own thread. http://ecocitycraft.com/forum/threads/suggestion-adding-shop-owners-as-owners.91731/page-2 Also, while on my phone.
It could be client-side network connection issues. Bad internet connection usually causes this when you're on your phone, it's happened to me several times before.
