ANACS has done some incredibly questionable attributions, mostly in the last couple of years. I've had Gem Red coins called MS62 RB, I've had others that came out of OBWs that were called "Recolored" in wholesale quantities... Still others that were significant doubled dies that never got labeled as such. I don't trust what their labels say at all, ever.
I've cracked some examples of their most recent yellow label holders and gotten grades two points higher with the other TPGs. For a lot of die varieties, I do better having them accurately graded and unattributed in a PCGS or NGC holder, they bring more money that way.
Because of all this I've cut my ANACS submissions back from about 50 coins a month to less than 20. They do okay when you spoon-feed them with precise attribution numbers. When Chuck Daughtry was doing contract attributions for them, every single coin was dead-on perfect.
Sorry to sound so negative about ANACS, hoping that one day an ANACS attributor stumbles upon this and can explain some of what happens in that company.
Also, for the record, they haven't recorded or updated population reports since 2005, so don't use their pop reports to guage rarity, the information is greatly skewed.