Google checkout/wallet is possibly the worst product Google ever made (excluding products that were eventually killed). If you've ever used it as a seller you've probably come across multiple issues that are never solved despite many people desperately trying to contact google (mostly failing to contact any human being, let alone one that would forward issues to developers) about them. It's no surprise it couldn't handle shit. The team left Google a few months ago too (there were some stories here about it I think).