I'm having trouble understanding a pattern. It's my first knit sweater (also first raglan and first cable) so I cannot really tell whether there's a mistake in the pattern or I'm doing something wrong.

I'm working on the yoke increases, with cables worked every six rounds. After working the first cable round, the cable structure is: P2, K4, P2 with a marker in the middle of the cable (as instructed by the pattern).

Then the pattern continues with:
"Round 7: [k2, p2, k until 4 st before marker, p2, k2, slip marker] 4 times stopping before last 2 st."

The last two stitches of the round are two knit stitches of the first cable (circled in red in the picture), so I stopped before working those. The next round is where I get lost:
"Round 8: [k2, p2, M1L, k until 4 st before marker, M1R, p2, k2, slip marker] four times."

I should knit the first two, which are the the first half of cable stitches, so that makes sense. But then purl the other two? I'm confused because wouldn't this break the cable construction?

I would appreciate some pointers, I don't understand why round 7 had me stop at the last two stitches 🥲

(Diagram direction is counterclockwise)

#Knitting