In fact, he WAS in his high 240's in those pics. They were taken 2.5 months after his loss to MOMO Benaziza where he weighed in his high 220's. He claimed that he had gained 20 pounds since the competition (his highest weight up until that point). He would come back the following year and KILL the competition and take first place and then come in second to Lee Haney.
BTW, how and why would he have lost 25 pounds since his 1990 showing? That wouldn't make ANY sense. He was getting larger and larger dude as the months were passing by and by 1993 he EXPLODED.