are you using eCart 6?
if so, try using this code for the billing info:
<?php echo WA_PP_ECO_GetValue($WA_PP_ECO_GetResult, "PayerInfo->Name"); ?>
<?php echo WA_PP_ECO_GetValue($WA_PP_ECO_GetResult, "PayerInfo->Street1"); ?>
<?php echo WA_PP_ECO_GetValue($WA_PP_ECO_GetResult, "PayerInfo->Street2"); ?>
<?php echo WA_PP_ECO_GetValue($WA_PP_ECO_GetResult, "PayerInfo->CityName"); ?>
<?php echo WA_PP_ECO_GetValue($WA_PP_ECO_GetResult, "PayerInfo->StateOrProvince"); ?>
<?php echo WA_PP_ECO_GetValue($WA_PP_ECO_GetResult, "PayerInfo->PostalCode"); ?>
<?php echo WA_PP_ECO_GetValue($WA_PP_ECO_GetResult, "PayerInfo->Country"); ?>
<?php echo WA_PP_ECO_GetValue($WA_PP_ECO_GetResult, "PayerInfo->Phone"); ?>