I think SGC tracked brands nearly from the start. What they didn't track was the poses, so earlier ones won't indicate wether it's a portrait or action pose.
For example My O'Leary portrait is the highest graded SC 350 portrait at 80, but there isan 88 available online from before they tracked the poses, and an 84 with an unknown pose.
There are a handful of T206s in their pop report that are listed very oddly, including 12 with a player name of "*" ( 2 hindus, 1 polar bear, 1 Sovereign "holding bat", 7 sweet caporal and 1 Broadleaf) I'm not sure what's up witht those, maybe test items that never got removed?
I'm pretty sure there are typos as well. I just can't believe there are 10 T210s that graded 100
If I'm wrong about that I'd really love to see one of them.
I'm not familiar enough with PSA.
Steve B