GoDaddy does some caching on the server level for sites. Caching can cause the page not to load the latest data and is a real problem in the case of displaying prices and navigating through the checkout pages since the URL's do not change per customer, only the parameters do. The article below shows you how to exempt URL's from this. At minimum, you will need to exempt /io_quoteform, /io_quoteconfirm and /io_contract.
https://www.godaddy.com/help/troubleshoot-cache-issues-32306