Okay kids, let's stay on topic here.
Adrien: You offered a lot of minor, copy/pasting errors, but missed the biggest flaw in the map, you also offered no assistance in fixing the source of the multitude of errors, which I'm certain by your maps you know how to fix. Also..it's his first time, just because someone else would have been harsher, doesn't give you a free ticket either. Chill man, this is supposed to be a helpful thread.
DoctorTodd: The small errors I see everywhere are no doubt just stemming from the fact that you are copy/pasting the tiles from the source set. That's where the tiles are either not lining up right or have gaps. To keep your repeating tiles like floors, walls, grass, dirt, stone, ect perfectly aligned, you should start making use of the pattern stamp tool in photoshop. It's very easy to make patterns in PS, just select the 32x32 repeating tile you will be using, click the "Edit" tab, then select "Define Custom Pattern" A window will come up with a box to name the pattern, and voila! You can now use this pattern seamlessly with either the pattern stamp tool or with the fill bucket (just select pattern instead of foreground). This should allow you to avoid these alignment issues. I also recommend going to Edit->Preferences->Guides grids and slices and setting the gridline to every 32 pixels, this will give you the option of aligning things just like they are in rpgmaker. The gridline is a good visual tool and anything you copypaste will auto align within it if you want. To turn it on/off, just use ctrl+h.
As to the mapping error, Your height is messed up at the door. The ground floor has walls two high, then the balcony above it has walls two high, so any place where there is a wall that doesn't have the balcony should have walls four high, like this:
Also, a critique for Adrien, I really think you need to stop using the airbrush tool to draw in your long grass and dirt. The gradient fade looks unnatural, a patch of long grass doesn't fade into oblivion, it slowly thins out and staggers off. Use one of the harder edged tools set to scatter, like this: