After further investigation I came across the following errors and warnings in the w3c validation for our order page:
<strong>Line 178, Column 262: Attribute aria-required not allowed on element input at this point.</strong>
…s2member-pro-paypal-checkout-card-type-paypal" value="PayPal" tabindex="200" />
One of these errors exist for each card option…(so this seems to hint at incorrect for set-up?)
Other errors include:
<strong>Line 178, Column 262: Attribute aria-required not allowed on element input at this point.</strong>
…s2member-pro-paypal-checkout-card-type-paypal" value="PayPal" tabindex="200" />
<strong>Line 202, Column 283: Any select descendant of a label element with a for attribute must have an ID value that matches that for attribute.</strong>
…ation-month s2member-pro-paypal-checkout-card-expiration-month" tabindex="220">
<strong>ine 205, Column 279: Attribute autocomplete not allowed on element select at this point.</strong>
…iration-year s2member-pro-paypal-checkout-card-expiration-year" tabindex="221">
<strong>Line 205, Column 279: The label element may contain at most one input, button, select, textarea, or keygen descendant.</strong>
…iration-year s2member-pro-paypal-checkout-card-expiration-year" tabindex="221">
<strong>Line 310, Column 1596: Duplicate ID s2member-pro-paypal-lang-attr.</strong>
…ember-pro-paypal-lang-attr" value="" /><input type="hidden" name="s2p-option" …
✉
<strong>Warning Line 277, Column 1878: The first occurrence of ID s2member-pro-paypal-lang-attr was here.</strong>
…ember-pro-paypal-lang-attr" value="" /> <!-- Auto-filled by the s2Member softw…