If you have had more than one device registered to your PC, it is being sent to the wrong one.
Been there, done that.....
Some Play Store apps downloaders will show you a list of devices, most don't... they just pick the 1st one in the list, and it is usually the 1st one you registered on that phone number.
So, I find the app on the PC, and then I use the Android device to pull up Play Store, find the same app name, and then download it. works every time that way.