If you're a moderator you're exempt from the limits. Login as a regular registered user then retry to ensure limits are respected. The limits are also per field basis unless you set the limits globally and have not set the fields to override the global value. If registered users are surpassing the limits ensure everyone isn't configured to by a moderator by checking the "Moderator View Access Level" within CB > Configuration > Registration > Moderation as it should be as strict as possible.

Seams to be working fine in my tests. The limits are per media type as well. This means if you set Photos > Create > Limit to 1 then it only applies to photos. I've set this to 1 and for that field a regular registered user can only upload 1 photo before it displays an error regarding their quota being reached. Are you sure what you're attempting to upload is actually the type you're trying to limit? For example a PSD is a File type and not a Photo type so it won't check against Photo limit, but against File limit.

Did you change the asset of your gallery fields or did you alter them? The limits aren't applied to an asset, but to an instance of a gallery. So if you're using that same asset in Field A in another gallery (e.g. Field B ) then it uses the parameters of that other gallery (Field B ).

It maybe just the field usage that's not working. Try setting the limit to Custom then set the Custom Limit to 4 and see if that works.