Hi,
1. Your two screenshots indicate that there is no categories under the category "audio & camera" ; so that is logical that the front-end indicate the same thing that the backend.
So there is no actual proof that the category "audio & camera" have subcategories.
2. You should re-download HikaShop 2.5.0 in order to be sure to have latest patches.
Then you should click on the button "rebuild" in your backend category listing toolbar.
If the issue persist ; you should take a look at these categories in order to be sure that they are right configured ; with the right category type and the right parent.
Regards,
Jerome - Obsidev.com
HikaMarket & HikaSerial developer / HikaShop core dev team.
Also helping the HikaShop support team when having some time or couldn't sleep.
By the way, do not send me private message, use the "contact us" form instead.