Hmmm...I followed your instructions. 4 articles were returned, none of which list how to enter alternate names on the ACOM member trees.
The article titles were:
1. Time to Take Note: The 1752 Calendar Change - Article on Julian/Gregorian calendars
2. 25 Alternative Sources for Death Records - self explanatory
3. 25 Pre-Civil Registration Death Sources - Self explanatory
4. Inside Scoop: Why Were They So Nosy? - Article on the various U. s. Census questions throughout history.