I've had this too. I think it was due to updates on their server. Just reset it and you are good to go.
Seems normal. Did it just happen when you actually logged in?
I couldn't even log in this morning when I tried to buy something. It kept asking me to verify who I was but never actually sent the code to my email. I had to contact customer service by email who got back to me in a couple of hours and fixed it with a reset password link.