The buttons are wrong, or have double text

This problem (and others) may happen if you are using the Ecwid Wordpress plugin and have the "Chameleon skin" feature enabled.
You should not use the chameleon skin feature with custom Ecwid themes as it will try to change them and apply a different kind of styling to the buttons amongst other things.

See https://help.ecwid.com/customer/en/portal/articles/1085017-wordpress-downloadable-#Chameleonskin

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