RMAN archivelogs are flagged as not obsolete after level 1 incrementals

In 11.2, I have an incremental RMAN backup strategy with a level 0 done on Sunday and level 1 done every other day of the week, with archive logs running every 15 minutes. Retention is set to a "RECOVERY WINDOW OF 1 DAYS". Why are the archive logs older than 1 day not considered obsolete? My understanding is that a complete (or recent PIT) recovery would be:

• Restore level 0
• Recover all level 1 backups
• Recover archive logs since last level 1

So, why are the older archive logs not obsolete? I see keeping at most 2 days, but there are currently 5+ days in the FRA.

I'm not using a catalog if that matters (and the controlfile autobackup is on).

Thoughts? With an archive running, I realize that my FRA freespace is way lower than I'd like...

Thanks!
Rich

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