Smart Groups - email


I’m new at using DT. I’m a freelance journalist and use it for my writing assignments. At first I thought to make a new database for each assignment, but then decided to make one database with individual folders for each assignment (Smart Groups) Now I’m not so sure. Anyway my main concern is when I make a new smart group from the data menu>use new from template>smart groups>email, it appears to link these together ie when I import emails into one email group it duplicates into all the others so I can’t delete the emails from one without deleting all. Has this got to do with using the new from template menu instead of the new? Because I do notice it doesn’t happen if I make the group using the new menu?

Also am I on the right track in only making one database and splitting it into folders for each subject?

Thanks for your reply.