How are you determining that your folders have been marked as Read Only? Are you referring to the item labelled "Read-only (Only applies to files in the folder)"? If so, please note that item does NOT indicate that the folder is read-only (see details below).
Are you having a problem that led you to look at that somewhat misleading item? If so, please provide details about the actual issue you're having. Are you getting an error message when trying to save a file or something similar? Please provide details and preferably a screenshot.
Details regarding the "Read-only" item in folder properties:
Note that item is labelled "Read-only (Only applies to files in the folder)".
That means it has absolutely nothing to do with the read-only status of the folder itself. You can see that for yourself with the Attrib command. If you look carefully, you will see that the box is always a solid block, on ALL folders, even if there are zero files marked read-only within the folder.
It is, in fact, not an indicator at all! It is just a dual-purpose command, implemented as a checkbox. Microsoft should never have used a checkbox for a command because it just causes confusion (there are many other posts like yours).
This is all it does:
When you click that box clear, you're telling Windows that you want to unset read-only from any files that may be read-only within the folder and its subfolders. When you check the box, you're telling Windows you want to set all files within the folder and its subfolders to read-only. Whether you set or unset, it only affects files. The read-only state of the folder, and any of its subfolders, is not affected. Only files are affected.
So, the item labeled "Read-only (Only applies to files in the folder)" does not indicate anything.
Unless you are actually having some problem, you can completely ignore this item.
If you are having some problem, that is causing one or more files within a folder to be changed to read-only, then this item may be used to provide relief (possibly temporary) by unsetting the read-only attributes of files within the folder. The problem with this bad Microsoft interface design is that it is misleading you into believing that Windows "keeps resetting my folder to read-only". And that certainly distracts from finding the root cause of whatever problem you may be having.
Read-only box = Neutral setting of a folder that is always displayed by default.
Read-only box = File is currently read-only. Only displays temporarily for a folder while setting to be applied to files in folder.
Read-only box = File is currently not read-only. Only displays temporarily for a folder while setting to be applied to files in folder.