The first 18 x 4.5 is standard and obviously correct.
The second 14 x 3.5 should have two pegs: 1st peg 3.0" from the right side; the second spaced at 5.5" (or 8.5" from the right); round over edge top and bottom only. (This mounts to the right side of the Oak Shelf Peg rack).
The third 26" Oak Shelf Peg rack should have 4 pegs spaced 5.5" apart starting 3.0" from the left side. (this should give 4.65" spacing on the pegs around the corner). Round Over bottom edges and left sides; right side square, top to overhang 3/4" on the right side (where it will meet the second).
Finally, there should be no holes (I will do the mounting). Also, could you please stain the work Golden Oak, but not shellac (I have been varnishing everything with polyurethane). I will send you a picture of the door and room in a separate e-mail so you can see how this gets installed. Do call me if there are any other question.