I did open it. What am I supposed to have noticed?
The OP’s original post indicated that in his document “the whole article is double spaced”. The lines in “deleteme Line Spacing.docx” are not double-spaced, at least not in the first paragraph.
“deleteme Line Spacing.docx” has no opening quote mark for the first paragraph. The OP’s original post showed a screenshot with an opening quote mark for the first paragraph.
The OP’s original post showed a screenshot with the base of the first letter flush with the first-line base. The base of the first letter in “deleteme Line Spacing.docx” is flush with the second-line base.
At least, this is how “deleteme Line Spacing.docx” displays in Word 2007 on my system.