Category list ordering

Hi,

Currently my site's gallery category buttons order is;
RS-10+, RS-1x, RS-2x, RS-4s, RS-8s, Unusual (see "the look.png")
www.siltest.com/boats/racing-shells/gallery-rs.html

But in the back end category list, the order is;
RS-1x, RS-2x, RS-4s, RS-8s, Unusual, RS-10+. (see "categlrylist.png")

How can I make the front end category buttons line up as it is in the back end?

Thank you for your help!

Dear ricola,
Thanks for your question about our product!
Sorry for late reply because we have a problem with our system yesterday!
About your problem, let's check option Ordering at back-end.You should choose option Item Manager Order
Hope this help!

Hello longdt,

Thank you for your reply, I've selected "Item Manager Order" already and that doesn't give me any difference.

www.siltest.com/boats/racing-shells/gallery-rs.html#catall

Anything else you could suggest?