Heya! You joined just recently, so in all likelihood it just got caught in the spam filter and is waiting for manual approval from a mod. Once someone gets to it, it should pop right back up just where you put it, and it'll be all good! The filter tends to get overzealous with new accounts, but...
It's dependent on how many messages you have, so when it hit 365 (the amount of days in a year), it said new years baby. And when you had 366 (the amount of days in a leap year), ot said leap year baby.
Probably not! Unless things have changed since last I checked, the queue is reviewed manually by RpN's volunteer staff, so it can be dependent on when a staff member is available to review the content.
So there are actually some special titles that set themselves when your post count has reached a certain number. Since 13 is considered unlucky, you managed to catch a glimpse of that one ;)
Now that you've posted this thread though and raised your count to 14, it's back to "New member"
There...
Heya! Completely understandable. That was around my extent of roleplay when I first joined too, and I was just about as lost as you are hahaha.
I recommend giving this a read! It ought to start you off well!
I also recommend giving the Handbook a good read, too, as that contains everything you...
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What @Kahir said. Most of the time, these fonts aren't compatible with mobile screens, so they'll show up as squares.
This is what it's supposed to look like when it does work:
As I suggested, you're able to bypass this by clicking the menu button at the very bottom of your post, clicking the "edit" button in the drop-down, and then copying your post from the edit box that shows up. Editing your post always displays the raw code for you. c: