Why are there two creation tales in Genesis which detail different orders of Creation? How is that a "misunderstanding"?
This is a misunderstanding, some believe that Adam was not the male and female that were told to replenish the earth.
27So God created man in his own image, in the image of God created he him; male and female created he them.
28And God blessed them, and God said unto them, Be fruitful, and multiply, and replenish the earth, and subdue it: and have dominion over the fish of the sea, and over the fowl of the air, and over every living thing that moveth upon the earth.
29And God said, Behold, I have given you every herb bearing seed, which is upon the face of all the earth, and every tree, in the which is the fruit of a tree yielding seed; to you it shall be for meat.
30And to every beast of the earth, and to every fowl of the air, and to every thing that creepeth upon the earth, wherein there is life, I have given every green herb for meat: and it was so.
31And God saw every thing that he had made, and, behold, it was very good. And the evening and the morning were the sixth day.
The Male and female were made and sent to repleish the Earth... Yahvah God blessed them.
1Thus the heavens and the earth were finished, and all the host of them.
2And on the seventh day God ended his work which he had made; and he rested on the seventh day from all his work which he had made.
3And God blessed the seventh day, and sanctified it: because that in it he had rested from all his work which God created and made.
4These are the generations of the heavens and of the earth when they were created, in the day that the LORD God made the earth and the heavens,
5And every plant of the field before it was in the earth, and every herb of the field before it grew: for the LORD God had not caused it to rain upon the earth, and there was not a man to till the ground.
6But there went up a mist from the earth, and watered the whole face of the ground.
7And the LORD God formed man of the dust of the ground, and breathed into his nostrils the breath of life; and man became a living soul.
8And the LORD God planted a garden eastward in Eden; and there he put the man whom he had formed.
9And out of the ground made the LORD God to grow every tree that is pleasant to the sight, and good for food; the tree of life also in the midst of the garden, and the tree of knowledge of good and evil.
10And a river went out of Eden to water the garden; and from thence it was parted, and became into four heads.
Some people take this as an elaboration of the male and female Yahvah God blessed, and some see that Adam came after that creation.
Genesis is only a brief account of what happened.