Three links in Signature

Is there some reason why I can’t have three links in my signature? Every time I try to edit it the third gets taken out, with a message saying I should check the rules. Except, there’s nothing in there that makes me think my signature is breaking any rules.

Can anyone point me in the right direction? I’d just like to get my signature working properly.

Yes I apologize. It should have been stated in there, and I have added it. 2 links in a signature is the maximim allowed.

Is there any reason for that limit? I understand not wanting people to link spam, but 2 seems a bit low.