Item filter

I'm not sure if item filter works properly. According to my personal opinion filtering logic works wrongly. I will try to explain with some examples below.

1. After I filter items by user, I see only items which are assigned to a particular user (e.g. Tom Joe). And it is correct.

2. After I filter items by status, I see only items which have particular status (e.g. New). It is also correct.

3. After I filter items by particular user AND status, I see items which are assigned to a particular user OR have particular status. Which doesn't seem correct logic.