excel cell text underlining

[Sugar2678]

I selected a cell and underlined the text.  It looked correct

However, when I clicked on the next cell, the underlining extended beyond the words to the end of the cell.

What am I doing wrong?  I have done this a million times and this week is the first time I have experienced this.

Thanks,

[#2]

Whether you selected and applied underline for entire row or column. coz you told next cell, whether is in a row or column.

[#3]

I only selected and applied underlining to the words, not the whole cell.  And it looks correct, but when I proceed, it reverts to underlining all the way across the width of the cell.  

Before

Cat sat on the hat

After clicking on next cell

Cat sat on the hat____________

[#4]

@Sugar2678 

I think you are entering data on same cell. 

After the word "hat", press Ctrl+U (or) disable underline, then type.

[#5]

Tried that (multiple times). Still same result.
I attempted to send you a screen shot, but would not let me paste on this forum.

[#6]

Can you able to send that file.