Knowledgebase Breadcrumb Omission

hi,
Where is the parent category in the breadcrumb? – i have a structure like so:
Home/Knowledgebase/parentCategory/subCategory/article
However when we navigate to a subCategory page the parent Category is not present in the breadcrumb, thus:
Home/Knowledgebase/subCategory/article

This makes it confusing as to where in the hierarchy subCategory and Articles sit. Both could belong to any parentCategory especially where topics are closely related. If we are able to create a custom permalink for the knowledgebase then i must be missing it because i cant see where we can alter it in the Permalinks page in the Settings menu??