Hate those wasted labels due to misalignment? Try this.
First of all, make sure Adobe Reader (or Acrobat Pro) is your default PDF handler:
Go to start->PC Settings and type "default" in the search bar (why they hid Control Panel is beyond me).
"Choose a default app for each type of file".
Click "Adobe Reader", or "Adobe Acrobat DC" which may be installed as well.
Hit enter and that part is done.
Then, when printing from Alexandria (through Reader), choose "Actual Size".
This has worked in the past but let me know if it doesn't work for you and I'll investigate further.