I think that's how it should be and I don't see a problem with that. What can be a problem is that reCaptcha can sometimes be really annoying and constantly asks you to solve the new captcha, and this happens if you use a VPN or TOR. Luckily, the forum offers the option to log in without a captcha, and all you have to do is click on the link "If you have persistent difficulties with the CAPTCHA, go here after logging in." and then you can log in without solving the captcha.

Of course, in that case you need to keep that link safe, because someone malicious could use it to brute force your login data, and the captcha just serves to disable/slow down this process.