Q: Create read only responsibility using 'EBS Read Only' grant

I am creating a read only Purchasing Super User responsibility.

Created a Grant and assigned the seeded 'EBS Read Only' permission set. Tied the grant to the Purchasing Super user responsibility.

Question1: Purchasing Super user responsibility is a mix of forms and OA pages. Does the 'EBS Read Only' permission set make the OA pages read only as well? if it doesn't how can they be made read only without customizing?

Question2: On some of the forms which were made read only, upon querying I am getting FRM-041050 You cannot update this record message. Have to click multiple times to get away from the message. Is this expected because of the 'EBS Read Only' permission set?