Hello David,
This is working correctly with C1IntelliSpell build2.0.20131.85. Could you please check with this build (available at http://www.componentone.com/SuperProducts/IntelliSpell/) and let me know if it works correctly or not.
If it does not, please share your environment details and what settings have you set for C1IntelliSpell. Also, let me know which document type are you spellchecking.
Thanks,
Richa