It is well known that Season 6 is fans' least favorite season.
"Season 6 was a disaster from start to finish."
Many fans act like Season 6 never happened. FanonDiscontinuity.
Why? Some disliked the whole Cheng arc, and also Graem and Phillip were a disappointment to many. They just didn't know what to do with them, after Graem was the shadowy guy behind Logan and Henderson. Graem had more screentime in Season 6 but barely does anything before he's anticlimactically killed, and Phillip, all he does besides kill Graem is kidnap his grandson.
Adding further disappointment to many at what could have been, seeing as how they were Jack's brother and father and yet didn't have as big of an impact as fans would like.
Personally I didn't mind any of this - though the Cheng arc was less fun, but Phillip, who is on Graem's level if not higher in the conspiracy of Season 5, takes the climactic fall and at least Cheng gets arrested.
It was Seasons 7 and 8 I disliked. They were not fun for me at ALL. But many fans felt differently and preferred them over Season 6.
One issue I had with Seasons 7 and 8 is that they disregarded Season 6. Season 7 established Alan Wilson to be the mastermind of the conspiracy - which was established in the previous two seasons to be Graem and Phillip, and no relationship between them is mentioned in either season. Season 7 doesn't mention Graem and Phillip, and Season 6 doesn't mention Wilson, who had not yet been created by the writers yet. Tony says he spent a while finding the mastermind behind the conspiracy (Wilson) even though Graem and Phillip were established as masterminds in Season 6 and their fates accounted for, so how would Tony know there was someone else on par with or behind them if it took that long to find him?
Then Season 8 completely disregards Logan's redemption and death. If you think he survived Season 6 they never reference the stabbing or "near-death", and once again he's heading a shady coverup conspiracy and convinces President Taylor to commit the biggest act of hypocrisy in the show (covering up Russia's involvement in terrorist attacks, after sending her own daughter to prison for the murder of Jonas Hodges, who killed her son, rather than cover this up).
So, what if the writers wrote Seasons 7 and 8 with the intent of ignoring Season 6 and pretending it never happened?
I mean, yes, they did mention Noah Daniels, who only appeared in Season 6, and Season 5 left Jack in the hands of the Chinese but he's back in America by Season 7 (having been released in Season 6).
But beyond that, Seasons 7 and 8 act like Season 6 never happened. I can't remember coz it's been ages since I saw them and I likely never will again (I FD THEM rather than 6), but do they ever mention Graem and Phillip in those seasons?
Also, yes, Logan was taking orders from Graem in Season 5. But Alan Wilson looks a bit like Graem, though obviously played by a different actor. Could it be that the writers were trying to say that Wilson WAS Graem, using different names (with Graem being an alias he was using for Logan, maybe even Alan Wilson also an alias since officially he "doesn't exist"?).
Or else maybe that Graem was the "middle man" between Logan and Wilson (like The Other between Loki and Thanos), as Season 6 was the one where he explicitly confessed to masterminding the conspiracy (along with Phillip), where Season 7 could have us think that Graem wasn't the mastermind, but Wilson's way of communicating with Logan.
Of course Live Another Day doesn't follow this example; all Jack's Season 6 kills - except Fayed for some reason - are listed, and Graem and Phillip are listed as his brother and father, both under status "deceased".