File server Shared Folder

What are the possible reason’s that a shared folder will be mapped to a wrong shared folder

1. Group A = \\Server\FolderA
2. Group B = \\Server\FolderB

Folders are mapped thru logon script, thru user Active directory grouping.

Are there issues, bugs or vulnerabilities identified related to fileserver folder sharing or it is related to active directory problem?

Need your inputs… Thanks in advance.