Row 7 of the Scallop pattern should be worked in yarn B, not yarn A as printed.
The instruction for making the bobbles was missed off the key. The bobble is indicated on the chart in the magazine as B, and is knitted as follows:
K1, P1, K1 in first stitch, return to left needle, K3sts together.
Below is Barb Brown's original chart, to clarify.