Oracle Database Discussions

I am doing a full database backup (oracle 10g) weekly and incremental backups nightly. The database is running in archivelog mode and I am multiplexing the online redo logs. However, when I look in windows the modified date for all Redo logs is displayed at the time the database was started up (Sunday night)... datafiles, controlfiles etc... show the latest modified date correctly.

Is this normal that the modified date is not updating on redo logs or do I need to do something else to ensure my online redo is operating correctly.

Any help would be appreciated.