Member login captcha issue

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I have a member registration page with the standard C5 captcha.
However, when I click the field to add the captcha code I also get a dropdown with previous attempts that covers the captcha I am trying to copy.
How can I resolve this?
See attachment

I would also like the link on successful registration to be linked to a specific page and not the homepage.
How is this done?

thanks

1 Attachment

trixiemay