'Recycle Bin' cleaning?

It's fully explained in the user's manual:

I promise to go back and read again. But I do recall playing with both fields and never seeing the contents of the 'Recycle bin' just go away after >4days. Since then, I have gone back to the default ReadyNAS values and have seen the 'Recycle Bin' clear. I will read and diddle some more. :oops:

The CIFS protocol offers a Recycle Bin. This allows for a grace period during which users can retrieve deleted files from the Recycle Bin.
When the Recycling Bin is enabled, deleted files are placed in the Recycle Bin for a period of time before being permanently deleted when the share is accessed using CIFS. Files deleted when accessed using other protocols are deleted immediately. ....

Enter the maximum number of days to keep files in the Remove files older than field.
Files that are older than the value you specify here are permanently deleted.

OK, I do understand the words, but have never seen the 'logic' work. Any/all files I may place in the Bin are 'dated' much in the past than the day I 'delete' them to the Bin. Should I set the Bin for '2 days', I read this to be today+2days. So, when I come back in 4+ actual days, I expect the 'old' files to be gone. NO. The trash was still present. (?) ODD? :?
Or, are you saying that the logic is asking me to enter a 'date' like M/D/Y? I do not see this option, but could play here also.

Enter a size limit (in megabytes) for the Recycle Bin in the Limit Recycle Bin to field.
When the Recycle Bin exceeds this limit, files are deleted, beginning with the oldest first, until the Recycle Bin no longer exceeds this limit.

This one I will play with tonight. I have found that a value of zero (0) seems not to ever work! But, I will try some other 'little values.'

Thank you for this help. In time, I will fully grasp this logic and drive/feed it properly. I truly appreciate your help.