Tkinter。网格没有改变小部件的位置

Question

Window that is created

def InputComp(Mainframe):
    Tk.destroy(Mainframe)
    InputCompet = Frame(Main , width = 600 , height = 600)
    InputCompet.config(bg = 'grey')
    Firstname=Label(InputCompet,text='FirstName',bg='grey').grid(row=0,column = 0)
    FirstnameInput = Entry(InputCompet).grid(row = 0 , column = 10)

    Secondname = Label(InputCompet , text = 'Surname',bg = 'grey').grid(row = 2 , 
    column = 0)
    SecondnameInput = Entry(InputCompet).grid(row = 2 , column = 10)

    InputCompet.grid(row = 0 , column = 0)

每次更改.grids中的行和列时，它都不会更改位置，除非另一个小部件位于它后面的行或列中，但在那种情况下，它仅将我移动一个行/列