It sounds like the duplicate of bug #1237 (7-Zip 9.22 can't extract some NSIS archives)...
Fail to restore dir. timestamp in some systems/files
7ZFM: Non-existent field values when opening raw FAT12 floppy disk image
MSI/CAB unpacker interferes with disk image recognition
Possible wrong version flag value when making .ZIP archive with NTFS timestamp
Wrong compressed size for GZip archive
Inconsistent deflate compression ratio
Can't choose SFX module, config file from GUI