That's actually pretty interesting. It may be a difference in how the timer works, or many an FPS issue?

This is very interesting. Thank you for the post! We'll definitely have to figure out the discrepancy with the timer.

what's this offline client and where do I get it?

RTA and IGT don't correlate in runs. My PB, a 3:09 RTA was a 3:56 IGT, while my best RTA of 3:07 was actually a 3:58 IGT.