I have also had this problem on an iMac running OS X Yosemite. Acrobat is selecting the default printer based on alphabetic order selecting a Dymo label printer over the system default.
While not a solution, a workaround is to:
- Confirm the correct printer is set as system default in System Preferences
- Delete printer set by Acrobat as default
- Re-add the printer from step 2 with a name beginning with a letter later than the default printer (I added a ‘z’ i.e. ‘zdymo…’)
Hope this helps,
Laura