Just to set the record straight, it wasn't my intention that elephants should negate the phalanx ability for a phalanx. Bearing this in mind you should assume that elephants negate a units rank bonus for the purposes of combat results _only_. As a side note, if you didn't use this rule than those poor old Barbarians would not get to add their rank bonus to their Ld when fighting an elephant!
While in rules question mode, a drilled unit may make its free formation change and march in the same turn.
Finally, I hope to get a MkIII version of the revised elephant rules off to the list in a week or two. My current thinking is to basically break the rules up into rules options' that players can add to the current elepahant rules if they wish, rather than making them a set of replacement rules as such.
Jervis