I tried to start a new thread but it said I need to wait 360 seconds since the last one. NP. I pressed back and then waited until I tried again ... It said that I have already posted that topic!!!?? So I tried again and same problem. Thus I just decided to make a whole new thread from scratch.
The limit is to prevent people registering new accounts to spam.
If you wait for a full 6 minutes after login, you would be able to make your post.
https://bitcointalksearch.org/topic/unofficial-list-of-official-bitcointalkorg-rules-guidelines-faq-703657
Q: Why do I get the "The last posting from your IP was less than 360 seconds ago." error when I haven't posted today?
A: Logging in, sending PMs and reporting posts to a moderator will also be counted as posting and extend this limit back to 360 seconds. Don't worry: as your activity increases, the 360 second limit will decrease as well. Here you can see the algorithm how the posting limit is caluclated based on your activity: https://bitcointalksearch.org/topic/m.4131557