Main stem no longer straight, growing crooked during preflower

I have these 2 Auto AKs from Gea Seeds breeder on day 40 each. They have been growing OK during this time, although one of the plants was planted when the germinated seed was very short, and it was also dropped at the moment of puting it into the soil.

This plant popped out the soil horizontally, the plant was crawiling over the dirt, to straighten up a few weeks later. It began growing straight up for 5 weeks, just like her sister, no signs of deficiencies or stress anywhere.

On week 5, the top bud stopped growing upwards, instead deviated to a side, letting the side shoots take the main light. Have you ever seen this? Attached you will find pictures of the top bud of this AK so you can see the main stem deviating from its main course!

It's what plants do.

Is this a normal thing for the main stems? To bent over naturally? First time I see this! Appreciate it.

When a plant is damaged like yours was....yes it's normal and natural.

super-cropping looks similar

It looks from your pics that the stem is unevenly split, its not any harm, in fact you will likely just get a double top. as for it growing across the soil... that will hinder the growth. In future soak in water for 24-48h (till when they sink) then put your seeds into jiffy pellets until roots show, then plant them into their final pot. you will improve your success rate and lessen the number of runts. good establishment of autos in the first week or 2 is key to the final yield.