My partner finds the text on this card ambiguous and I can see his point:
This: [q="sushidog"]The leader and units in up to 3 adjacent, linked, contiguous hexes to the leader are ordered.
is exactly what this:
all the ordered units have to be adjacent to at least one other ordered unit forming a chain back to the ordered leader"
means, exact the former is in more precise and concise language. Assuming one is a native English speaker, there is nothing ambiguous about it.