On the shop page, the back button which appears next to category titles does not function as it should.
The back button simply has a javascript event attached to it – javascript:woodmartThemeModule.backHistory()
When selecting filters, the URL changes, and so becomes a history item.
As a result, if you are in a sub-category, filter products, and then wish to go up to the parent category, the back button will not go up a category, instead stepping back through the history of filters you have applied.
My recommendation and what I would expect to happen is for the button to be coded to link to the parent category if one exists and if one does not exist, to link to the main shop.