Where was the Roman Army in AD408?

[Flavivs Aetivs]

It's interesting to note though that at this time the Palace guard seems to have been commanded by the Cura Palatii, not the Comes Domesticorum as the Domestici no longer functioned as an imperial guard, merely a placeholder unit.

The Candidati were the 40 personal guards of the Emperor, and were part of the Scholae.

My questions on this sort of actually surround the development of the Spatharii... we know they come into existence by the reign of Anastasius and my guess is that by the early 5th century the Spatharii were appearing as the real palace guards, commanded by the Cura Palatii.

But then again, that still doesn't make sense. Could Comes Domesticorum and Cura Palatii have become the same title? Could the primary sources be confused as to Aetius' appointment in 423?