profile fields are not populated in ReceiptMessage.tpl

The contribution thankyou email (templates/CRM/Contribute/Form/Contribution/ReceiptMessage.tpl) includes sections for $customPre profile, and $customPost profile. Like:

{foreach from=$customPre item=value key=name}

{$name} : {$value}

{/foreach}

There's three problems:
1) These fields are arrays hence you get something like "phone-Primary-Phone : Array"
2) $name is the internal name and not the display name
3) the arrays contain only information about the field, not the actual field value