I pretty much gave up on layers in Hema. In Gaia Pro you can drag the order of the layers and the percentage of each layer to be displayed. It appears this code is incorrect in the Hema verison.
Thanks for illustrating the similarities between Hema Explorer & Gaia =)
Can you (or someone) post a screenshot of the issues you're having with layers? It's important to note that there are 'Active' Layers and 'Available' layers. If you try to have too many (more than 3) 'active' layers, things start to get a little wonky.
I generally run only 1 or 2 active layers, depending on what I'm doing. I've used the app very extensively on both Android & iOS and I've never seen any issues with layers except when I have too many in the 'active' section.
Another thing that I've found helpful is turning off wifi/data when you're offline. Sometimes the system tries to go find tiles even if it's already downloaded them, but turning the radios off helps that. You can also enable 'offline' mode within settings on the app.
Also, PM me if you'd like to have a quick phone chat about where we're going. Since you're so involved I'd love to express our ideas in more than forum posts =)
Thanks one & all for trying out Hema!