Unchanged order of multiple markers of a location after filtering

Eh, what now? Z-Index of what? Icon? Marker? I honestly don't know. What specifically needs the z-index?

If a location has two categories, two markers are displayed one above the other in the map within a view. The z-index shows that the values ​​are the same.

<div class="leaflet-pane leaflet-marker-pane">
    <img
        src="/sites/default/files/2025-03/opfer.png"
        class="leaflet-marker-icon leaflet-zoom-animated leaflet-interactive"
        title="Playground-Spur" alt="Marker" tabindex="0" role="button"
        style="transform: translate3d(648px, 266px, 0px); z-index: 266;">
    <img
        src="/sites/default/files/2025-03/taeter.png"
        class="leaflet-marker-icon leaflet-zoom-animated leaflet-interactive"
        title="Playground-Spur" alt="Marker" tabindex="0" role="button"
        style="transform: translate3d(648px, 266px, 0px); z-index: 266;">
</div>

If I want to display only certain categories using a view's filter, the z-index doesn't change for those locations. The correct locations are displayed, but the image doesn't match the selected category. The affected category would either need to be given a larger z-index or the non-matching markers would need to be hidden.

Shouldn't the latter happen anyway?
I mean, if you ignore geolocation and just imagine a regular list view; shouldn't the filter only show relevant entries?

Currently, I only have one post, so please don't be surprised. When I change the view to an unformatted list, the post loads twice, see screenshot. When I click the appropriate category in the filter, the post still appears twice. I also enabled Reduce Duplicates, but that didn't change anything. Is the problem with the view?

Currently, I only have one post, so please don't be surprised. When I change the view to an unformatted list, the post loads twice, see screenshot. When I click the appropriate category in the filter, the post still appears twice. I also enabled Reduce Duplicates, but that didn't change anything. Is the problem with the view?

I've attached two images. Strangely, they can't be included in the reply - the post isn't saved. Currently, I only have one post, so don't be surprised. If I change the view to an unformatted list, the post loads twice, see screenshot. If I click the appropriate category in the filter, the post still appears twice. I also enabled Reduce Duplicates, but that didn't change anything. Is the problem with the view?

I've attached two images. Strangely, they can't be included in the reply - the post isn't saved. Currently, I only have one post, so don't be surprised. If I change the view to an unformatted list, the post loads twice, see screenshot. If I click the appropriate category in the filter, the post still appears twice. I also enabled Reduce Duplicates, but that didn't change anything. Is the problem with the view?

I've attached two images. Strangely, they can't be included in the reply - the post isn't saved. Currently, I only have one post, so don't be surprised. If I change the view to an unformatted list, the post loads twice, see screenshot. If I click the appropriate category in the filter, the post still appears twice. I also enabled Reduce Duplicates, but that didn't change anything. Is the problem with the view?

I've attached two images. Strangely, they can't be included in the reply - the post isn't saved. Currently, I only have one post, so don't be surprised. If I change the view to an unformatted list, the post loads twice, see screenshot. If I click the appropriate category in the filter, the post still appears twice. I also enabled Reduce Duplicates, but that didn't change anything. Is the problem with the view?

I found the cause. The "Reduce Duplicates" option was enabled in the filter. After disabling it, everything worked as expected. I'm sorry for my clumsiness, and thank you for your quick support.

Don't worry, you're absolutely welcome :)