I woke up to nine pages of errors today guys, it seems one set of errors have been replaced by another I'm now getting nine pages of these.
Type of error: User
The letters you typed don't match the letters that were shown in the picture
None of these mods can STOP the bots from trying. Bots are trying. It's a fact of the internet.
Some of the mods log the attempts in SMF's error log (which IMHO it's useful for the admin to know that the attempts are happening on their forum), some don't, but they enhance protection nonetheless.
If you installed a mod that doesn't log anything, I would recommend to take a look in your webserver access log, to see if there are many requests to login2 or register2. You might find there are, meaning bots are still trying.
So what you see means probably that bots are trying, but they're stopped by Captcha on the login page. I strongly recommend activating a custom question too. Even a simple question like "3 + 2 = ?" would be useful.