Cannot log into club website

I cannot log into my clubs website. My club number is 1888268. I enter my name, and it automatically fills in with my name and password. When I club "authenticate," I get a message that says wrong login information. I have noticed that the "authenticate" icon turns [blue ]when it works and stays yellow when it does not work. Turning blue and working is random. Sometimes it works and sometimes it does not work. How do I fix this? Thank you.

FTH allows you to select your name from the drop down after you've typed in the first few characters - so that fits with what you describe as "automatically filled in"

FTH does NOT automatically fill in your password. I suspect that is coming from your browser cache. If you type your password in (override the "automatic" browser value), your login should work if the password is correct.