Map Zoom level not "working" when there is more than one pin to show

[CedLuck]

Hi there,

I have this app that displays pins on a map regarding certain category or criteria.
For example, this view displays a table :

Clicking on the little map icon leads to this map showing all pins regarding the category.

An action triggers this behavior by using this expression :
LINKTOFILTEREDVIEW(“Carte”, [Catégorie] = [_THISROW].[Catégorie])&"&_zoom=11"

As anyone can see, there’s an indication of the level of zoom I want the map to show up to. But that doesn’t seem to work when there are multiple pins on the map (it works only when one pin shows up).
This is what I get:

And this is what I should get:

I think the “multiple pin on the map view” call, triggers some kind of middleware that calculates a barycenter point and adjust the zoom such as all the pins fits on the screen.

So my question is : is there a way to force the behavior to stick to the zoom level specified in the expression ?
Once again, this work perfectly well when there is only one pin to show up.

Leads to:

Thank you for your attention.
CedLuck

[WillowMobileSys]

Did you figure out a solution for this problem?