Hello Kim,
I hope you are well today.
The plugin will prevent you from finishing the checkout procedure even if you increase the quantity on the cart page. There will be a notice stating that you have exceeded the limitations if you click the Update Cart button on the cart page.
Also, please make sure you have the following options enabled in the plugin’s settings:
– Frontend > Validate on Add to cart
– Frontend > Cart notice > Enable
– Frontend > Block checkout page
If you have any other questions, then please let us know.
Kind regards,
Moshtafizur