Decipher, like other manufacturers, did not fully randomize cards. It's really expensive. Decipher used 11 by 11 card print sheets - which is why we had 121 rares, uncommons, and commons in large sets. In the large sets, the 121 rares were divided into four groups. Each box contained 30 or 31 "fixed" rares from a group and 5 or 6 random packs. There were also fixed orders for uncommons and commons.
For some reason, I still have the lists for draft boxes and Two Towers. For instance, in Two Towers the following four rares usually appeared in order:
aldor, mauhur,
forbidden pool,
new fear. I don't have the lists for Fellowship, but I was told a similar pattern existed.
This isn't just Decipher, by the way. Magic had fixed common order for a long time, where players would memorize the common runs for advantage in draft.