Bug with the name display-3

For example,A carft called A,A carft called B,and A carft called C.I drove A to dock B(now it is called A),and drove C to dock them(now it is called C).That's no problem.But,when I controled B to separate B away,the name of
B was displayed C,and the name of A-C was displayed C-xyz.
(My English is not good)