Problem with porftolio items

Hello,

I have a problem with this theme.

I created two portfolio categories:

clients

doors

I then created items for each category and checked to which portfolio category each item belong.

But, when using previous and next portfolio item navigation on left and right, it shows items from both categories with wrong breadcrumb path.

For example, I start with my first item from clients category. Left arrows shows item from door category and when I click it breadcrumb shows this:

home: client – door, instead of home: doors – door

Help? Thanks.