Why is bash eating my history?

-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 If I run ls /usr/X11R6/lib/xscreensaver/ then /usr/X11R6/lib/xscreensaver/hopalong then close the hopalong window, sometimes I find the last command in my history is still the ls. Other times it is the last command I entered. This has been going on for a month or so, that I'm aware of. It really bugs me. Anybody understand this? STH -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.2.2 (GNU/Linux) iD8DBQFAQwCYwX61+IL0QsMRAgsMAJ9xmMuUYCiGLghA9CDvlL1bqzq+fwCg4N8a JiAVvgnTMQ9eSDd88l9NZzg= =sSYP -----END PGP SIGNATURE-----