Some random questions here

Hello, I'm new in this game (NTW) and I noticed that there are some minor glithes (or should I say bugs) present on the game. Let me enumerate some of my observation.

First scenario, I used Spain against Portugal I can't longer recall what map and yeah it's a custom battle. I got 3 skirmishers on that battle and during the deployment part of the game when there's a borderline, I saw that my 3 skirmishers are way out of the deployment zone and I can certainly deploy them anywhere, I think those are DLC's skirmishers and I said to myself that maybe that's one of their abilities but hey! anywhere on the map? actually I can deploy them almost at the front part of the deployment area of Portugese.

Secondly, I noticed that when I play custom battles some maps are missing (Singe Player), well what I meant was when I tried to host a battle on a Multiplayer battle the map list is way beyond what I saw on the custom battle options the list shows some maps like Waterloo etc whereas I can't use that map on a Single Player custom battle. Now, my question is... Is that really the case on Napoleon Total War because I'm an avid player of Empire Total War before and the maps that are available in custom battle there are also available in Multi Player battles.

Well yeah, that's for the meantime and that's what I've noticed on this game. So guys I'll wait for your answers and I hope you'll answer some of my queries. Thanks and have a nice day.

1st - those skirmishers have a deployment zone of their own, i think that is a white box?
2nd - those are scenario battles, they are playable through the historical battles option

1) They have the guerilla option on, and can deploy anywhere except very close to the ennemy general (white rectangle is an exclusion area)