dear Na Maruf
the reason is, that your block-definitions do not match regarding insert-point and orientation of the L:
If i insert both Blocks at the origin i end up with this:
(A) you have to redefine your block-instances, so they both match regarding insert-point and orientation.
insert both blocks at the same position as a test - they have to match the behaviour you want.
(B) If you insist on a “solution” - which is more a workaround for a mistake - you can define a nested block, (a block inside a block) that corrects the orientation / insert-Point.