Please do not bump your topic. A reviewer wil get to it when they can and you will get a proper review.

To fix some of the bugs that you are having, in the Construction Set go to World -> Exterior Cell and there you can give your cell a name, set the region, and make it illegal to sleep there.

When I told you you could bump your topic, I was pretty sure to tell you after a week without replies. Not every few hours.

Yeah, sorry about the delay. I'm taking a look at the showcase right now.

Okay. This is not the most thorough review, but here's what I have to say after taking a look.

• The most important thing is that the file's not clean. It has the classic set of dirty GMSTs, which should be cleansed with TESAME, but it also edits some other things needlessly. It edits the vanilla "ex_common_door_01". The file also edits the cells of Pelagiad, Caldera, Balmora and Caius Cosades' House as well as some exterior cells that aren't near the town. (Dialogue-wise it also has some unnecessary, empty dialogue Topics left over and it edits the vanilla "Background" topic.)
• There's no need to create a unique ID for each individual door placed in the cell. One can use the vanilla doors. Some of the newly-created doors aren't used and should be removed from the file.
• I know the town is bit of an anomaly (an Imperial settlement in the Ashlands with mostly Dunmer populace), but I would avoid adding the Dunmer "furn_de_overhang_0X"s and the urns in a town with Imperial architecture.
• There's no Path Grid set. The town has NPCs so they should have paths. (Normally, Path Grid is made by the NPCer, so this is not that big of a thing in an exterior showcase)
• There's no need to create a new Region for the town. The name of the cell can be edited by double-clicking on the cell name in the Cell View window. Doing so will also create a map marker for the town.

Some placement issues:

• The two "ex_drystonewall_s_01"s between houses five and six aren't placed together properly (minor bleeding and caspering).
• "urn_03_food" (43458, 19879, 1730) bleeds into the basket next to it. 
• The bridge bleeds into the terrain rather too noticeably on the one end (ex_common_plat_cent 43209, 15508, 1642; to be precise).
• "crate_01_armor_chitin" bleeds into the ground too much.

It appears that none of the new objects in town have any rotation on their X and Y axis, only on Z. Some rotation on the X and Y axis makes the items' rotation look more "organic" in a way. For example the rowboat (nice touch by the way, a rowboat in the desert! love it) could use some X and Y rotation. Several containers and items are owned by Berapli Ashumallit, a vanilla NPC. In a showcase is not advisable to just copy and paste stuff from vanilla cells. (It appears that the showcase deleted Ashumallit and some of her mabrigash friends)

The vertex coloring could be more precise, underneath every larger stone, tree, etc. More importantly, there should be visible darker shades underneath the buildings. It appears that all the vertex coloring in the cell is leftovers from the vanilla version of the cell. It also appears that very little landscape editing was done. That has some problems. For example the entrance with the southern entrance to the city, with the bridge, is located on a pretty steep
hill. Nothing that the player couldn't handle, but it looks a bit odd. More importantly, it's rather crucial that we see from the showcase that the exterior maker can handle editing the landscape -- right now there's little to go on.

The showcase has potential, but needs more work. I like the overall look of the cell; it's a neat little town. There's creativity there, but for a promotion-worthy showcase we need more concrete, technical things. To be precise: 1) make sure the file's clean (I recommend using TESAME) so it only edits the things it's supposed to edit, 2) edit the landscape (maybe add a road leading out of the town?), 3) edit vertex colors (darker shades under buildings, etc), 4) more advanced rotation of clutter (and maybe more clutter and other details in general -- for example, I noticed there aren't any chimneys in town).