I'm having issues when after cropping a pdf, it doesn't follow through with the task.

1.) I open the pdf I want to crop.
2.) I click "edit". Then I click on the crop icon and select my area. I double click inside the crop area.
3.) This takes me to a crop dialog box. I click "OK"
4.) This takes me to image of "cropped" area. I close out of "edit" dialogue box.
5.) I save and close the PDF.
6.) I reopen the PDF and see a cropped document. I close the PDF.
7.) When I place it in InDesign, it has not been cropped.

Please advise. Thank you.