No plus and minus symbols?

It's because you are not meant to rate yourself. You can only rate others once the number in () next to username reaches 100. The [!] is there because you can always report abuse from the start.

The [+] and [-] is used to rate a response or comment. It is for the other users to rate you. You cannot rate yourself. Thus, you only see a [!] below your post. You can use this to delete your own post. Good day!

You have to take part in discussions be it posting or replying to discussion, as far as your stats here in myLot you haven't reached the 100 rating it means you need to participate more since you have little activities yet in myLot once you've reached a hundred that's the time you have the positive and negative for posted feedback thus gives you your first star reputation. I suggest you do more here make a more than a hundred so that you can have a reputation star and can eventually make a positive or negative rating. Have fun!