Question: When I attempt to print labels for a single group, I get labels for all contacts. Advice appreciated, please.
Answer: I'm assuming you want to print labels for all contacts in a group. (Not group labels)
Select the group, then under the groups menu, choose create Lookup. This will give you a lookup of just the members of the group in the contact list.
Then run your labels. (File - Print - Labels) and choose Current Lookup to print just labels for members of the group.