Permissions locked folders

I am the administrator & sole user of my iMac.



For some unknown reason I have 3 folders (under Documents) that are locked. When I access “Get info” under permissions it says “you can only read.” My name is listed correctly under name column & under the Privilege column says “read & write.” Under the general section at the top I can check or uncheck the “sharing” box but the “locked” box (which is checked) is grayed out. On the lower right of the window I can click the lock & enter my Admin password & then the lock is open. Yet, I cannot uncheck the locked box as it remains grayed out. Also I am unable to change the privilege from read & write for me or for everyone, it immediately goes back to what it was.



All the posts I found either say to log in as administrator (I already am) or to enter certain commands in Terminal or to log in as Root.



Am I missing something obvious? Any ideas as to WHY a few folders decided to lock themselves? More importantly is there a simple way to unlock them?



I also checked get info on several non-locked folders & the lock box is also grayed out.



How is it that I as the administrator am not allowed to change these settings? These are not system folders. One is a folder I created years ago & the others are My Music & My Videos. I can’t imagine that they are supposed to be locked by default.



Thanks for any help.