Using ACL permissions in general causes problems. You should only use them in certain situations where there is no alternative to achieve what you need. In most cases you don't need them.
I have published the long explanation of this several times in different threads. I guess if you do a search you should find one of those threads.
Thank You. I'm just going to run with your statement "In most cases you don't need them." as it appears the Permissions on the Privilege screen does the job.