Dropdown menu looks terrible (width doesn't change)

Hi there,
Using Joomshopping Mega Menu
I have a lot of level 2 options so i want to create

---

type 1

---

type 2

---

etc

---

etc
dropdown
----type 1 brand 1----type 1 brand 2----type 1 brand 3

---

type 1 brand 4
----type 1 brand 5----type 1 brand 6----type 1 brand 7

---

type 1 brand 8
----type 1 brand 9----type 1 brand 10----type 1 brand 11

---

type 1 brand 12
----type 1 brand 13----type 1 brand 14----type 1 brand 15

---

type 1 brand 16
----type 1 brand 17----type 1 brand 18----type 1 brand 19

---

type 1 brand 20

but instead of this (it looks fine in admin panel) frontpage looks like this

the width of dropdown menu in backend is 900 but it doesn't save