Why does my prompt look like /panfs/roc/groups/<n>/<group>/<username> ?

This is a result of a level of indirection in the paths to homes. If you would like to eliminate this behavior, add the following to your .bashrc file:

[[ "$(pwd)" =~ /panfs/roc/groups/11/group/username(.*) ]] && cd ~/${BASH_REMATCH[1]}

Replace '11/group/username' with whatever you see at your current prompt.