The "At the Same Time" instructions mean you're going to decrease both on the neck edge (every other row a few times, then every 4th row a few more times) whily you also do the raglan decreases as stated for the eyelet raglan shaping on every other row.
Sometimes it helps to write these out on a piece of paper. Draw a line down the center, one column is marked as Neck edge, the other Raglan. Then write out the decs for the neck row by row, and the decs fro the raglan also. That way you can keep better track of what you do where and when.
sue- knitting heretic