Just to chime in. I have never experienced a problem like this until the other day. I was loop recording a guitar part and the recorded audio would be late by a measure or two. I did have the metronome on and a count in of 1 measure. If I disabled the looping it works with no problems.
 
Seems to me a bug has crept in to Platinum. Hoping to hear if Cakewalk can reproduce.

Looks like I finally fixed it. 
 
As previously mentioned WDM works. I deleted the aud.ini file, restart Sonar with the WDM mode.  Switched to ASIO and it worked!   brundelfly's suggestion of the aud.ini seems to be a key or at least a key in this. 
 
Thanks/Jack
 

Thanks for the info Fireberd and Brundlelfly! I will see if that also fixes the looping and recording problem.