You teach that Noah and his family waited seven days in the ark before the flood came, which is a picture of the Rapture happening before the seven-year Tribulation, but Genesis 7:11-16 says they entered the ark on the same day that the rains came. Doesn't that change our understanding of the timing of the Rapture?
It's important to note that Genesis 7 is not written in a purely chronological fashion. Moses doubles back in a circular manner typical of an Eastern, Hebraic style of writing as he tells the story of the flood. If we reorder the text of Genesis 7 slightly, we can create a chronological progression in the narrative, which allows us to understand the narrative more clearly:
Gen. 7:6 Now Noah was six hundred years old when the flood of water came upon the earth.
Gen. 7:7 Then Noah and his sons and his wife and his sons’ wives with him entered the ark because of the water of the flood.
Gen. 7:8 Of clean animals and animals that are not clean and birds and everything that creeps on the ground,
Gen. 7:9 there went into the ark to Noah by twos, male and female, as God had commanded Noah.
Gen. 7:13 On the very same day Noah and Shem and Ham and Japheth, the sons of Noah, and Noah’s wife and the three wives of his sons with them, entered the ark,
Gen. 7:14 they and every beast after its kind, and all the cattle after their kind, and every creeping thing that creeps on the earth after its kind, and every bird after its kind, all sorts of birds.
Gen. 7:15 So they went into the ark to Noah, by twos of all flesh in which was the breath of life.
Gen. 7:16 Those that entered, male and female of all flesh, entered as God had commanded him; and the LORD closed it behind him.
Gen. 7:17 Then the flood came upon the earth for forty days, and the water increased and lifted up the ark, so that it rose above the earth.
Gen. 7:10 It came about after the seven days, that the water of the flood came upon the earth.
Gen. 7:11 In the six hundredth year of Noah’s life, in the second month, on the seventeenth day of the month, on the same day all the fountains of the great deep burst open, and the floodgates of the sky were opened.
Gen. 7:12 The rain fell upon the earth for forty days and forty nights.
Reordering the text in this way produces a chronological sequence, and in that sequence, we can clearly see that the phrase "on the very same day" in v.13 is speaking about the day Noah and the animals entered the ark, not the day the flood came. The family entered on one day and then seven days later the flood came.
Therefore, the imagery of the Rapture is not disturbed, and in fact, this reinforces the picture, because it confirms that all believers in the Church will be removed from the earth in the same moment, "on the very same day" so to speak.