Years ago I was making a SILK blouse with a V neckline, the closing was at the back. The pattern instructions for the front were to sew down one side, pivot, leaving the needle in the down position and continue up the other side. Well, it puckered, so I did it again and again and again with same results. I did it so many times I was getting close to running out of the facing. Frustrated I did my very best hoping that the tiny tuck it made wouldn't be noticed! Now I know better... you must always take at least two small stitches at the V for the "TURN OF THE FABRIC." If your fabric is heavy, such as polar fleece, then you will need even more smaller stitches to get around the V and it will still look like a V. This method will give you that sharp V you're wanting because the fabric now has room to turn under smoothly without being crammed into a space too small to accommodate it.
This goes to show that you can't always rely on what the pattern company writes We mistakenly think they're going to show us how to sew an item, however their main goal, and the way they make their money, is to sell us their paper patterns. Unfortuntely, new sewers rely on commercial patterns... they can't! The instruction sheets leave a lot to be desired and can sometimes be either misleading, make no sense or be completely wrong. I rest my case.