Standards and uniformity sometimes seem like more trouble than they are worth.... yes, unit, dates, etc. are already in the biography, but so is the country of service, unit name, etc
trying to add all of the service members to a free space pages seems like extra work since they should already listed in the categories, but if that is the way you want to do things.....
Looking at one of the profiles, Aikman-2 it has
{{War of 1812
| startdate = October 15, 1812
| enddate = unknown
| branch = 5th Regiment of Lincoln Militia
| unit = Canada
| rank = Private
}}
which places the profile in category: Canada, War of 1812 and in the maintenance category because it is missing the |units= parameter
it should be
{{War of 1812
| startdate = October 15, 1812
| enddate = unknown
| branch = Canadian Militia
| units=5th Regiment of Lincoln Militia
| unit = 5th Regiment of Lincoln Militia, Canada
| rank = Private
}}
which places the profile in category: 5th Regiment of Lincoln Militia, Canada, War of 1812 and passes the edit check so it is not added to the maintenance category
as explained on the sticker page,
|units= is for display on the sticker for all units served in
|unit= is for the 1st unit category, additional units are added using [[Category:xxx]] for each of them