Ok, just tried manual entry and, as long as I don't click on any numbers (which has been a quick and easy way of doing things), it seems to display everything fine. So, maybe it's just a numeric "click" issue... but it's very disturbing and made me worried, that if I kept going I might lose my currencies due to a glitch in the system or something.
I'll see about letting them know about this...
Just buggy software - not the greatest platform out there for sure.