Hi,
I did the same as you : putting austria AND transalpine (and both SQL files) on the same card and then activating BOTH maps.
But I think you are wrong. The red color paths which are displayed are those from Topo Transalpine and not those from Topo Austria (main part of Austria is included in Topo Transalpine).
But I should have a look again to check if part of Austria not included in Transalpine can display red paths when both are activated.
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