This situation is mildly frustrating – any thoughts?

Well here's a thought. If you buy algorithms on an iOS device or an Android device, the prices get translated by Apple and Google into different price tiers and we have no control over how they translate into local prices.  However, if you buy algorithms on the desktop version of H9 Control that uses PayPal and there you pay in US dollars.  So, if you're unhappy with the rates you're seeing on iOS or Android, you might want to buy algorithms on the desktop instead.