Hello! I'm going to install X2a shortly, but in case this isn't addressed in the patch (I'm not seeing it on the list):
There appears to be a bug where drag & drop importing a file places the clip very (very) far down the timeline, even though I dragged to around the start of the timeline.
Info for bug replication:
Sonar X2 64-bit
Win7 64-bit
Drag & dropping from Sonar's Browser
Importing through USB from Zoom H4n, recorded at 44.1/16
Importing into 48/16 or 48/24 project
Hope this helps!