Terminal / Bash: Permission denied when appending to a file with RW rights granted by ACL

I have a file "test.log" inside a directory. The directory has an accesslist, defined as: 0: user:Me allow list,add_file,delete_child,file_inherit The file "test.log" (created by root) has automatically the following access rights: -rw-r--r--+ 1 root wheel 0: user:Me inherited allow read,write As "Me", I can open this file in Terminal – for example with nano – edit it, save the changes and exit nano. Result: the file has been changed as expected. When I use the following command: echo "test" >> test.log I get the error: -bash: test.log: Permission denied "Me" is a standard user. When I su to an admin user, the admin user gets the same Permission denied error when executing echo "test" >> test.log. Even, as admin user, when I use sudo echo "test" >> test.log I also get the Permission denied error. Only as root can I append text to the file using echo >>. I have no idea, how to fix that or what causes this behaviour.