Hi Jill,
Thanks so much for reaching out!
Unfortunately there is not a way to change the user who is registered, as the person who purchases the tickets is the name on the attendee list.
You can however change the default quantity using the following WooCommerce snippet, which may help to dispel some of that confusion:
https://docs.woocommerce.com/document/adjust-the-quantity-input-values/
You can also add this idea to our Feature Requests, as we tend to implement ideas based on customer feedback, so your input is greatly appreciated:
https://tribe.uservoice.com/forums/195723-feature-ideas
Let me know if that helps!
Thanks,
Jaime