Hello and thank you for your comment. We understand your concern regarding the use of the same email address for creating an Easyeda and JLCPCB account. While it is possible to use the same email address, please note that Easyeda and JLCPCB are separate companies, and their user data servers are not shared between them. As a result, you will need to log in separately to each site. This ensures the security and privacy of your data within each company's respective systems. If you have any further questions or require assistance, please don't hesitate to let us know. Best regards.