I'm not really understanding why when I try to register at certain forums they say that my form has been detected as a spam bot.
I don't really know why this is something that only happened recently. Is it because I've been joining a lot of forums and using the same email information? It's becoming annoying because I can't join forums.
Your email address could cause anti-spam services to detect you as spam. If you have your own like @mysite.tld then they may block it. Or if someone used your email to send spam around (they registered on sites with your email).
Your IP could have been used by a spammer before you got it. The anti-spam systems still haven't cleared the IP yet so it's still being classed under spammer. (If you go to stopforumspam and check your IP to see if it's listed there If it is listed you may be able to contact them to see about clearing it.)
Your username could also cause the system to detect you as a spam bot since plugins often check usernames too and will stop signups based on that.