Hello,
1)
Can we show slug instead of the attributes name?
This is how WooCommerce displays attributes, we don’t have additional options for this. But keep in mind that you can add terms directly from the single product page, for example
https://gyazo.com/82cb56571511c546ea5283a68daa2d13
2) I don’t see the mentioned issue http://prntscr.com/sxuvl1 Have you sorted out?
Regards