Hmmm.... that's possible. MOTU's drivers will have changed for Win8 so canceling the reset may not work the way it used to even though CEntrance seems to be recognizing the driver.
In that case, you can do it the old fashioned way by re-recording an audio track, zooming in and using "nudge" to align the recorded track to the source track, and noting how many samples you had to nudge (typically about 1ms = 44 samples). That's your manual offset. Note that you'll have to trim the beginning of the clip a little to allow nudging earlier.
Or you can add SONAR's External Insert to an FX bin, set the I/O channels, and click the Delay button to measure latency. I'm not exactly sure why, but I've found that you have to add the ASIO buffer size (128 in your case) to the reported value to get the correct total RTL.
BTW, have you re-checked the MIDI-Audio sync now that you're using ASIO drivers? The bulk of the issue may already have been fixed by that.