Sub sub categories

I’ve got the latest responsive directorypress theme.

I have:

Category A
– Sub A
– Sub B
–Subsub A
–Subsub B

If I click on Category A, then it takes me to a page showing Sub A and Sub B.

If I click on Sub A then it just shows the listings in it. Correct.
If I click on Sub B then it shows the listings in it. Wrong. It should show Subsub A and subsub B.

I’ve checked all the settings and searched the forum. Could anyone please help?

Thank you.

Donna
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