...Now that I look back at 247sports I see some rankings have already changed. Trotter and Fernandez both downgraded from .81 or so to .77 and .75 respectively. So now we only have three 3 star guys! I'm not sure if any others moved or not.
To help you understand what you are seeing, this is what happened. The 247Sports rating that you looked at is a composite number, made up of ratings from the four services, not a rating by 247Sports itself. Initially, the .818 rating that Fernandez had reflected his 3-star rating from Scout.com, which he still has. The initial .811 rating that Trotter had reflected his 3-star/5.5 rating from Rivals.com, which he also still has (well, sort of - since Rivals no longer covers MAC teams, there is no longer an Ohio page, so his rating went into limbo, and all Ohio players are now auto-rated down to 2 stars).
247Sports had not rated either player, and since it's just a MAC team, 247Sports apparently has no plans to ever rate them. They did, however, have a blank space for a rating to fill in, so they auto-filled it with a rating of "70", which means very-low 2-star, and is the lowest rating that they ever give anyone. It is the same thing they did for all unrated players for any MAC team. Once they averaged the 70 with the 3-star rating from somewhere else, they both ended up as low 2-star rated players, since the 70 overwhelmed the 3-star rating.
... A 3 star guy on Tuesday should be a 3 star guy on Wednesday whether he signs with Ohio State, Ohio University, or Ohio Dominican. I don't believe for a second that they watched tape on either of these kids and decided they deserved to be downgraded. It seems like they're doing this to manually adjust their overall class rankings.
Indeed, a 3-star player is a 3-star player. They didn't downgrade him directly, since they had never actually graded him before, but indirectly, they did. In essence their "we know nothing so he must be bad" rating now carries just as much weight in their system as the rating that was given to the player by someone who actually looked at him, and who thought he was pretty good.
As iffy as the ratings by these services were in the first place, their quality drops each year, at least for the teams at the bottom. I can see a day coming in the not too distant future where they don't rate them at all.