When is a circle not a circle

In attempting to create a circle of netting using rows instead of rounds and with about 50 loops around the circumference, I made some changes to the sample from last week.

I reduced the number of loops in the first and last rows. However, I also increased the number of increase and decrease rows to the extent that this piece of netting looks more like an octagon rather than a circle.

This sample has 47 loops around the circumference and a total of 486 knots.

Instructions
Row 1: Tie thread onto foundation loop, net 6 loops into foundation loop.
Row 2: Net 2 knots in the first loop, net 1 knot in each loop except the last loop, net 2 knots the last loop.
Row 3: Net 1 knot in each loop.
Row 4: Net 2 knots in the first loop, net 1 knot in each loop except the last loop, net 2 knots the last loop.
Row 5: Net 1 knot in each loop.
Row 6: Net 2 knots in the first loop, net 1 knot in each loop except the last loop, net 2 knots the last loop.
Row 7: Net 1 knot in each loop.
Row 8: Net 2 knots in the first loop, net 1 knot in each loop except the last loop, net 2 knots the last loop.
Row 9: Net 1 knot in each loop.
Row 10: Net 2 knots in the first loop, net 1 knot in each loop except the last loop, net 2 knots the last loop.
Row 11: Net 1 knot in each loop.
Row 12: Net 2 knots in the first loop, net 1 knot in each loop except the last loop, net 2 knots the last loop.
Row 13: Net 1 knot in each loop.
Rows 14-24: Net 1 knot in each loop.
Row 25: Net 2 loops together, net 1 knot in each loop except the last 2 loops, net those 2 loops together.
Row 26: Net 1 knot in each loop.
Row 27: Net 2 loops together, net 1 knot in each loop except the last 2 loops, net those 2 loops together.
Row 28: Net 1 knot in each loop.
Row 29: Net 2 loops together, net 1 knot in each loop except the last 2 loops, net those 2 loops together.
Row 30: Net 1 knot in each loop.
Row 31: Net 2 loops together, net 1 knot in each loop except the last 2 loops, net those 2 loops together.
Row 32: Net 1 knot in each loop.
Row 33: Net 2 loops together, net 1 knot in each loop except the last 2 loops, net those 2 loops together.
Row 34: Net 1 knot in each loop.
Row 35: Net 2 loops together, net 1 knot in each loop except the last 2 loops, net those 2 loops together.