It kinda looks like from the picture that maybe your cartridge is installed upside down?
Your DI resin should be changing color from the bottom up... the end the arrow on the cannister is pointing to should be blue and the opposite end should be tan. That's not what that first photo is showing.
And maybe my eyes are playing tricks on me, but the cannister doesn't look fully packed either.
Is the 2nd photo the cannister from the 1st photo installed? I'm a bit confused there.