[78-L] Reused numbers?

[David Lennick]

Okay, gang..I have here Columbia Flag Label 68008-D, Henry J. Wood conducting 
parts 1 and 2 of "Tills Merry Pranks: or a Rogue's Rondo" (sic!) and on 
googling this number to find out if it takes a second disc or is edited, I find 
several references to Hamilton Harty conducting Mendelssohn's Italian Symphony 
on Columbia 68007/9-D, a 1931 recording. What the heckity heck is going on here?

dl