Tiki perms may be painful but they are damn good once you understand them
The Levels shouldnt be made available at objects. What would be much better is to correct the original problem of changing permissions for a structure.
btw. You can create wiki pages in a number of ways creating a WikiWord for example on an existing page and clicking its ? when saved. Or by adding the quick edit a wikipage module.
or even just tiki-edit_page.php?page=PageNameHere
Hope it helps, can you assist us in the structure permssion code?