Jim/Sam is in the stairwell talking on the phone to Melinda, and just as they are wrapping up, another doctor says, "Dr. Clancy, got a minute?" No one knows he is Jim Clancy. Everyone sees and knows him as Sam Lucas.
Regarding the other Goofs referencing the "Dr Clancy" line - Jim/Sam's hospital white coat (at least in the first few episodes of S5) is embroidered "S. James Lucas M.D." - so his colleagues would probably know him as "Jim", but "Dr. Clancy" looks like a definite Goof.
When the Ghost Surgeon is operating, a heart monitor with red LED displays is seen. The date of the surgeon's death is found out to be 1959; however, the first practical LED was invented by Nick Holonyak, Jr., in 1962.