Available Delivery Services

Thanks for the Basic Version – very nice.
My question is : For a product of specified dimensions and weight – 8″ x 6″ x 6″ and 1.25lb, the plugin only provides one delivery method that my dropship supplier uses – USPS priority mail. The supplier is in New York and offers:-

UPS
UPS Ground
UPS Three-Day Select
UNITED STATES POSTAL SERVICE
First-Class Package Service
Priority Mail

Of these, the plugin only offers priority mail – and I have selected the other options in the plugin. Can you help please?
Thank you very much.