u/Particular_Loan_9886

I've been trying this game out for several times during several years, usually getting insecure about my own idiocy and thus losing interest. Now that I'm committed, I got stuck in my usual drop place, and still can't get my head around why some other solutions don't work, even if I eventually find the correct one.

Example being 3rd and 4th puzzles here (correct solutions already drawn):

Puzzle section

If I understand correctly, the whole "gimmick" of this type of puzzles is the fact that figures can be rotated. If so, why is it then, that in the 3rd puzzle neither of these two solutions is correct?:

Incorrect solution 1 for puzzle 3

Incorrect solution 2 for puzzle 3

And for the 4th puzzle this isn't either?:

Incorrect solution for puzzle 4

Thanks in advance.