Brian,
Cloverleaf probably sucked in a lot of messages from the file (unless you throttled it) once you started the thread before your Hold command could be acted upon. Those messages will still continue through the engine. Those might be the messages you saw.
Jim Kosloskey
email: jim.kosloskey@jim-kosloskey.com 29+ years Cloverleaf, 59 years IT - old fart.