I had a few security login issues, but they went away.
This is what I remember:
1. My login wouldn't work.
2. I requested a new password using the link.
-my email is a yahoo account and easily accessible on my phone, but not easily accessible on my computer
-therefore, I looked up the email on my phone, leaving my computer on the "...an email has been sent to you.." screen.
3. On my phone, I opened the email.
-the link was not clickable, but I just copied and pasted it into a browser (on my phone) and it took me to the reset-password screen
4. I entered in a new password (on my phone)
-this worked, and I went to a screen that said something like "...Contratulations Stile! ...You have successfully activated your account..."
-I closed the browser on my phone at this point
5. Went back to my computer and clicked on the Login button to login
-entering my credentials, it wouldn't work... it would say my password didn't match
Now, I tried this a few times, and it wouldn't work.
Then, all of a sudden, it did work.
I think this is what I did differently to get it to work, but I'm not sure:
1. My login wouldn't work.
-same as above
2. I requested a new password using the link.
-same as above
3. On my phone, I opened the email.
-same as above
4. I entered in a new password (on my phone)
-this worked, and I went to a screen that said something like "...Contratulations Stile! ...You have successfully activated your account..."
-NO LONGER THE SAME AS ABOVE
-I noticed that I was, actually, logged in as "Stile" correctly (I think this happened before, too)
-I did not close my phone-browser at this point
-I used my phone and navigated "somewhere else" on the forums, opened a thread or something (can't really remember)
-I left my phone browser open
5. Went back to my computer and clicked on the Login button to login
-entering my credentials, it worked without issue
6. I then closed my phone browser
7. I went back to my computer, logged out, logged in again... and it still works fine.
Hope that information helps.
Good luck!