Later Etruscan League Large Units

This matter was referred to in the Spartan Large Units thread. The Later Etruscan League army has the following entries:

8-18 Hoplites FP 4 1 C 1 Long Spear 12/9

up 6 Hoplites FP 5 2 B 3 Long Spear 23

0-2 Elite FP 5 2 B 3 Long Spear 23

It is my understanding that large units generally can be formed with the upgraded unit in the front rank, even if the list does not specify that the upgraded unit forms the front rank of the large unit (as in the Gauls list). The problem in this case is that the "up 6" Hoplites in the front rank would be discipline class B, while the second rank Hoplites would be C class.

Further to our previous conversation I think the upgrade leads to a single stand unit. Beyond the lack of rules for mixed Discipline units I think the single stand Etruscan hoplites allows the player the option of building an Etruscan army primarily of single stand spear and pila units as an alternative to an army of large unit phalanxes.

yes, I confirm that LU must have always the same D. If the Units have not the same D then they cannot form Large Units.