1. So what do you thing could be the reason why particular tracks are being reanalyzed unnecessarily? If I only select them and start analysis, they aren't ticked, which is good. But if I select them with multiple other tracks, the problem track gets ticked again, while the others are unticked.
2. 'Long time ago' would be around less than 2 years. But if that's how you want to keep it, cool. But I am sure there are users who won't like album gain at all.