Coursepress sign up course - make account pop up

See: Coursepress sign up course - make account pop up

Why is the:
.enrolment-container-div .bbm-wrapper #error-messages
showing two times?

See:

https://screencast.com/t/yr9DK6YRcfT0
https://www.screencast.com/t/jECscxk3nG

Same user name, is coming up two times.