Author, entries that are not completely correct are only temporarily removed to allow any problems to be sorted out. Asking for proof of purchase is standard practice for us, when paid images are used, you can either add the screen shot to a step by step, blacking out your name and any other information, or you can send it as an attachment to mods@pxleyes.com
Welcome to pxleyes, you might want to have a quick read through http://www.pxleyes.com/guidelines/ and also http://www.pxleyes.com/blog/2009/06/how-and-where-to-find-legal-source-images/