Phil is only aware of the events of CoM because one of his fans spoiled it on Twitter.From looking at the comments, apparently Phil is aware of the events of Chain of Memories.
I believe what happened was Phil was due to play KH 2 the next day so he tweeted about how he was reading up on CoM's story and making his usual comments about how the plot made no sense and they over-complicated shit and added too many things into it, etc etc; basically bitching about a game he's never played. Then KGhaleon tweeted out the major plot details to DSP to fill him in or some shit like that.
It apparently disappointed a lot of fans because they were hoping DSP would play CoM, but now there wasn't really a point since everything was spoiled.
I'm sure there's screen-caps somewhere, I'll edit them in if I find them.