To eliminate the mistyped names in Internet Explorer, click on 'Tools', then 'Internet Options' to open a dialogue box. On the 'General' tab, centre area titled 'Browsing history', click the 'Delete' button. That opens a new dialogue box. Make sure the 'Form data' box is checked before clicking on the 'Delete' button there. That should clear those mistyped names.
That'll work - but it'll delete ALL the form data!!!!!
You don't need to do that!!!
Just click in the box and type s and the list of options will appear - now use the arrow keys to go to the one you want to delete, and press the Delete key on the keyboard and that entry will go (and only that one). Repeat for the rest of the duff entries.
HTH
CB