I found an error in the Tweedy pattern published in Petite Purls: When you begin the Front, the instructions for Row 1 should be fixed:

Row 1 (RS): With CC, work Row 1 of Tweed pattern across first 16 [18, 20, 22, 24] sts, with MC, k 26 [28, 28, 30, 30], with CC, work Row 1 of Tweed pattern across last 16 [18, 20, 22, 24] sts.

Essentially, the center panel should be KNIT across, not purl across, since this is the Right Side.