strange menu link when adding single article

when i add single article to subpage menu it add extra fields to link like "category"
now i have ink like this
"http://my-site/k2-user-groups/single-article"
"http://my-site/tagi/single-article2"
"http://my-site/k2-users/single-article3"

It strange issue do You know why it happen like this??

I dont have k2 installed on my site.
All article I check are added to category with name "static"

Hi,
1) maybe you had - if you are using QuickStart?
2) To be sure, please clean all items in Trash inside Menu Manager.
3) Check also All Menus searching alias "k2-users" etc.

p.s.
If this won't help, let me know - sending access to back-end I will check.

nothing on trash but strange thing that when i change order everything start to be ok :/

ok but even if i had something in trash how it supposed to influent to new item of menu?

ok but even if i had something in trash how it supposed to influent to new item of menu?

I saw similar strange problems in J2.5, so maybe ask J! developers, not us. Magic happens.