You can slap me if you like. I'm no expert. But we've all been where you are now. All I can say is that your first suspicioun is probably correct. The details you have put in are slightly wrong. One letter out and the whole thing crashes (as you know). Can I suggest that if ANY passwords etc are doing an "auto complete" that you delete them and fill them in manually because I have known them to complete incorrectly.
Sorry and best of luck.