Hi there, Miranda! Sorry for the issue here, but I can help you out.
WooCommerce removed the styling for the quantity controls starting in version 2.3, which affects tickets in the WooTickets form. Here’s a post that explains why they chose to do that:
https://wordpress.org/support/topic/no-more-quantity-selector-after-update
There is a plugin available that helps bring the controls back:
https://wordpress.org/plugins/woocommerce-quantity-increment/
Also, I notice that you are currently running WooTickets 3.9. We released an update just last week that helps solve some compatibility issues with WooCommerce 2.3–I’d suggest updating when you get a chance. 🙂
Does this help answer your question? Please let me know. 🙂
Cheers!
Geoff