Have you tried to reproduce the issue in a new project? I am guessing this project was not started in X3.

I only way I can reproduce what you're seeing here is if I assign the track output to a mono hardware interface output (either left or right) AND the panpot is panned to the same output (e.g., the left interface out is selected, and the panpot is panned left). Then, I THINK the sound is being panned by the panpot because it visually matches what I'm hearing, but in reality it's being "hardware-panned" by virtue of going to the mono hardware bus that is assigned to left. Yet the clip is still playing back in mono as far as Sonar is concerned, and therefore, there is the same level in the meter's left and right channels.
 
Other than that, I give up - can't reproduce. But it's looking more and more like there's something going on with the RME being treated as all mono outs that is the cause of some disconnect between Sonar and the TotalMix software.

Thanks for trying Craig. The above pic is showing a stereo output port.
 
I took the audio track and imported it into a new X3 project and it panned as expected. I don't think it is the RME connection to SONAR. I think it is an issue with SONAR importing older projects. Something got hosed in this project or wav file.

I dont think in this case its a problem opening old projects unless your project was corrupted to start with. Most likely it is either a routing problem or there is a simple explanation based on signal flow. Its difficult for people to guess what the problem might be without seeing the actual project and reproing it. The best way to ask for help in these cases is to post a link to the project.
Signal flow with pan can be complex when you add different track effects/clip effects, prochannel fx, stereo/mono clips, pan envelopes, offset mode etc. I'm pretty sure your problem falls into one of these buckets and despite you might think its not a SONAR bug. If loading in 8.5 was ok all that means is 8.5 stripped out all the new stuff like prochannel modules etc. Or 8.5 has a bug that doesn't expose this issue. And yes hundreds of issues that existed in  8.5 have been fixed since - its 4 years since that was relased!

K, I will post a project.
 
Like I said a few times though, no plugs are on the track or buss(no buss involved) and a direct output from the track exhibits this issue as shown in the picture..

Here is the project. I opened the bundle by itself and it exhibited the pan issue I am having.
 
http://joyfulnoiseproductions.org/PAN.cwb

Guitarmech111
Here is the project. I opened the bundle by itself and it exhibited the pan issue I am having.
 
http://joyfulnoiseproductions.org/PAN.cwb

for anyone else that downloaded this, if downloaded as a wave file like it did for me, just change the ext, to cwb
 

I can pan it right, but as soon as the signal is centered up it will not pan to the left.
Meaning as the pan control moves toward all left, the signal remains equal in both channels.
This remains true for both sending it to the "Master" buss, or straight out the interface.
I'll "play" with it some more later.
I have a project started in X1 that many tracks have similar problems.
When ported to X2 the pan remained whenever it was in the original project.
The pan control had no effect at all.
 
Tom

I've just downloaded and tried on my machine that has the RME Fireface 400 hooked up and I can see the same problem but if I create a new track and move the audio it works fine.
 
Not tired on the machine that is hooked up to my UFX.

Same here, pull it into a new track and all is fine; I inserted a "new" audio track, I did not clone the old track.
This is in the office on my FW1884; I should get out to the studio later and I'll have a go with the UFX.
 
T