Real sorry, but you're not getting my issue here.
Let me try to explain this as simple as possible.
BLESTA DEMO.
Clients click order
They get redirected to order form, where they choose their plan.
After choosing their plan, they get to either register/sign in.
MY BLESTA INSTALLATION.
Clients click order
They get redirected STRAIGHT to a sign in page. Unlike the blesta demo, They can't choose their plans, and get redirected straight to a login page.