02-14-2015, 03:33 PM
(This post was last modified: 02-14-2015, 03:37 PM by The 100 Mega Shock!.)
Since they appear to be unchanged from BIS I think it's safe to assume they're a leftover from very early in development, for the programmers to test things before any new sprites had been made. It's not uncommon to see work-in-progress images of games using content from prior titles, or to find those graphics left in the final games' data.