Maximum queued uploads and maximum Mb in queue

In the Options tab in File Sharing there are 2 options, one is to limit the maximum number of queued uploads per user and the other is to limit the maximum number of Mb per user in queued uploads. I have tried checking these and cannot change the number and unchecking these options and cannot change the number. Where do I go to change this number or how do I change this number. In the Transfer tab you are able to enter the number of upload slots, but this only effects the number of active users uploading, I do not want users to have 10, which is the number in the field, I want to limit the queued uploads to like 3 or 5. Also the Mb figure is 50 which does not cover the size of the files. Help please.