How is it they are working on patch 4 when i do not see patch 3 in steam. I only see patch 2 was this mislabeled as patch 3? Even in the instructions to install the patch it only shows how to apply patch 2.
My recollection is that patches are applied automatically ( so you probably have patch 3 ), but for those people that want to keep playing old savegames ( which are not compatible with patch 3 ), they created a mechanism to keep your game on specific older patch levels, beginning with patch level 2.
The implication is that this is a policy for future patches as well, as many are unlikely to be savegame compatible.