Oh, I quite was Sarcasm... I loved em!
As for Scythian Sarmatia confusion, the Scythians can be recruited by those who control their lands. Steppe tribes were always fluid, and rather than dying out, many tribes either were absorbed into their conquer's armies or migrated. Thus, we have a few Scythian units as they certaintly didn't disappear!
The difference between Sarmatia and the former Scythia is really just tribes, and locations. At this time the Scythians were still around, but in serious decline. The Sarmatian were on the rise, and soon would conquer all of the Scythian's former terrotories. They have similar army types, but the Sarmatians were slightly less rich to begin with, and not as settled as the Scythians are at this time.