Check boxes changing size?

Hi all, I am having an issue with check boxes changing size on me, even though I have not changed any settings…

Here is the document in question- the check boxes below “If LOCATION is an issue” are larger than the check boxes above, even though I used the same method to create both sets (Select lines requiring checkboxes > bullets on/off using shortcut in top toolbar > right click selected lines > bullets and numbering… > character > select “webdings” from drop-down list > select the square symbol (4th column from the left, 5th row from the top) > OK > OK

Lesson form.odt

Why is this happening, and how do I adjust the size of the check boxes?

Thanks in advance.