Late Roman Unit Sizes

[ValentinianVictrix]

Claudian, (The War against Gildo 1 415-423) writes that:

'Stilicho made ready for war the most famous strengths in Mars (in the army), selecting there from special maniples from selected youth: he further prepared the fleet in the harbours of Etruria. Alcides himself commands the Herculean cohort; the king of the gods leads the Jovian. The Nervian cohort follows and the Felix, well deserving its name, the legion, too, named after Augustus, called the Unconquered, and the brave Leones (Lions) with the witness shield.”

From what I have been reading different authors interpret this force to consist of either five units, six units or seven units. Why is there so much difficulty?

The Panopolis Papyrus 2 mentions the following: Lancearii of legio II Traiana at Ptolemias, Lancearii of legio II Diocletiana at Panopolis.

The evidence continues to mount for the Lancearii being legionaries or being an integral part of a legion.

My interpretation of that text is that there is only one entire legion present, whose name is a bit of a problem because its stated it was named after Augustus, yet the text also calls it the 'Unconquered', which would make it the Legio Palatina Undecimani.
There are are three legionary cohorts, one from each of the following- Legio Palatina Herculani Seniores, Legio Palatina Ioviani seniores, Legio Palatina Nervii. The Felix I believe could well be the Auxilia Palatina Felicies Seniores. The Leones are the Auxilia Palatina Leones Seniores.

By my reckoning that makes six units not seven?