Pilot Charts

I found that you can get pilot charts displayed on qtvlm; found instructions and downloaded a folder of north pacific ocean charts. Was able to access and display on app but i have to activate raster mode in charts and if i magnify too much my other charts bleed through. Has anyone used pilot charts and found a way just to an individual pilot chart only? I use the command open one chart and get the pilot chart i want, but if i zoom in i get my regular raster charts. I right click and hit command close this chart and pilot and other raster charts close too.  Just wondering if i could reduce opacity of a chart or another command to fix this.

That is strange because if you chose "Open one chart" from the charts menu, then only this chart is displayed regardless of the zoom level.