Thought to start a new thread instead as the other thread states "Solved"
Ok, I have done some tests in different browsers, but the problem persists.
I've been using Galaxy Note II (Jelly Bean) Tried with Chrome, Stock, Dolphin and Maxthon. The first time it lets you comment on and it says comment waiting for moderation, but you never get notification about that comment in your admin panel.
The second issue is that when trying to comment on the same blog, it starts giving you the same error i.e "Error Posting Comment, Comment being too short"