When: Last hak update.
What: Ranger Dual weild no longer counts as a pre-req for two weapon defense,
Prior to the last hak it did, this doesn't seem intentional as I cannot find mention of it in any change log.
Recreate: Create a ranger with 15+ dex, and view the feat list.
Ideas: Add dual weild as an alternative pre-req to two weapon defense? I'm not a coder.
(If this is intentional and not a bug I apologize)