Yes I have the same problem. I've been asking for 18 months for Squaresapce to make editable admin notification email templates but they wont do it. Others have been asking for 2 years. You cant even customize an order email subject *per individual product*. Its a fundamental requirement for manageable ecommerce yet Squarespace seem to consider it some kind of 'nice to have feature'. I'll be leaving the platform soon on this basis.