Removing files inside container not working

Hello, I am not able to delete/rm/mv files inside a container.

After issuing an rm command I still see files listed as below. Seems to happen for every container run, irrespective of the image(ubuntu/centos etc). help!
Sai

??? ? ? ? ? ? gct-foot.R
??? ? ? ? ? ? iec60559.R
??? ? ? ? ? ? iec60559.Rout.save
??? ? ? ? ? ? internet2.R
??? ? ? ? ? ? internet.R
??? ? ? ? ? ? internet.Rout.save
??? ? ? ? ? ? isas-tests.Rin
??? ? ? ? ? ? isas-tests.Rout.save
??? ? ? ? ? ? lapack.R
??? ? ? ? ? ? lapack.Rout.save
??? ? ? ? ? ? libcurl.R
??? ? ? ? ? ? lm-tests.R
??? ? ? ? ? ? lm-tests.Rout.save
??? ? ? ? ? ? Makefile.common
??? ? ? ? ? ? Makefile.in
??? ? ? ? ? ? Makefile.install
??? ? ? ? ? ? Makefile.win
??? ? ? ? ? ? method-dispatch.R
??? ? ? ? ? ? method-dispatch.Rout.save
??? ? ? ? ? ? nanbug.rda
??? ? ? ? ? ? no-segfault.Rin
??? ? ? ? ? ? ok-errors.R
??? ? ? ? ? ? ok-errors.Rout.save

server environment
Red Hat Enterprise Linux Server release 7.3 (Maipo)
3.10.0-514.6.1.el7.x86_64 #1 SMP Sat Dec 10 11:15:38 EST 2016 x86_64 x86_64 x86_64 GNU/Linux
Docker version 1.13.0, build 49bf474