No, you have to fill your choices according to your favor. Seats are automatically upgraded as the counselling rounds passes.

Suppose you get the second choice in first round of counselling. You will get the first choice of your preferred list in second round if you are eligible for it.

Similarly for the extended rounds also, the target is to gain your first choice. The counselling system has been programmed like that.

For more information visit this link :

https://engineering.careers360.com/articles/kcet-important-dates