the one at the very top is 1.2.18 and won't work. It may be a bit confusing because if you go the Mod Organizer page, Mod Organizer v_1_3_8 is the third file in the list. If you mean the Unofficial Skyrim Patch won't sort into the proper order in the right pane, make sure you're using the latest version of Loot and triple check that you're running Mod Organizer 1.3.8. The load order is in the right pane and sorted by Loot. The install order is in the left pane and you should be able to sort it manually into any order you want. I assume you're referring to the left vs right panes in Mod Organizer. I'm not sure I understand this completely. Its only the load order on the left that is being automatically rearranged by MO. The plugin load order of MO also looks fine. I know this because recently I've had to re-install all of Skyrim, MO, and the other utilities from scratch. At the menu look for the option for Mods and select that feature. When you get to the press any key to continue do so. Install said mod and enable it in the left pane. This issue happens to me as well, but I have the latest MO. To enable the mods plugin do the following: Download the mod with a ESL plugin.
