Hi Diego,
The Blog setting can be adjusted, but unless you have really short blog posts I think it is a better mobile experience to have only one post shown at a time. See this part of theme.skin file:
<blog:BlogDisplaySettings runat="server"
UseBottomNavigation="true"
HideCalendar="true"
HideFeedLinks="true"
HideStats="false"
BlogViewUseBottomDate="true"
BlogViewHideTopPager="true"
BlogViewHideBottomPager="false"
ArchiveViewHideFeedbackLink="true"
HideTopSideBar="true"
HideBottomSideBar="true"
OverrideListItemHeadingElement=""
PostListForceExcerptMode="false"
PostListForceTitleOnly="false"
PostListUseBottomDate="true"
PostListOverridePageSize="1"
PostListDisableContentRating="false"
DetailViewDisableContentRating="false"
UseBottomContentRating="true"
DisableShowCategories="false"
DisableShowArchives="true"
DisableShowStatistics="true"
/>
Regarding the menu, we build the menu as a json string in the mobile menu so the page names are html encoded but they should display correctly. If you enter à in html markup it should render as à.
Hope that helps,
Joe