Query not usable for some users

Question: I have few queries which has a property "created by" is blank
and few of them has actual creator BW-User names.

Question-1 : Why some of them are with blank creator ?

Question-2 : The queries with blank creator are visible to a
user and he can execute these queries but for those queries where we
have "creator" name in query property , they are giving "No Authorization"
for the same user .

nb. Creator and executor are different users.

Answer:
I know there is an authorization object based on the creator of a query, maybe is it part of the solution for question 2

Ch

Answer:
we have tried that object (s_rs_comp1) as well, doesn't make any difference.

Any more hints or ideas to check...

TIA
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