Linux:compress: restrictions about zipped tar files

From the tar's user guide:
Notice also, that there are several restrictions on operations on compressed archives. First of all, compressed archives cannot be modified, i.e., you cannot update (--update (-u)) them or delete (--delete) members from them. Likewise, you cannot append another tar archive to a compressed archive using --append (-r)). Secondly, multi-volume archives cannot be compressed.