The tempo indicator "o" which is also what drives the metronome. There's never been a case reported that I'm aware of of the metronome not following the tempo map. 
You can open the Metronome dialog box and check the settings there too. Try both the midi or the audio metronome. 

Is this with audio or MIDI material or mixed?
Changing tempi may get confusing if you copy paste MIDI clips. Every pasted clip includes a tempo definition.
If you have pasted a clip with tempo 120 at measure 10, and then change tempo at measure 8 to 100, it will switch back to 120 at the start of measure 10.
 
I'm not sure if this is the culprit in your case, but it's something you need to remember.
As suggested already, check the tempo map.
 
I can't imagine a situation with tempo window showing 108 and metronome staying at 120. Is it really 120 or just wrong/irregular? Or is it the SONAR metronome at all? In case you're talking about MIDI, do you possibly use a MIDI keyboard or workstation that can feed in a metronome of its own?
 
 

Thank you everyone

its very hard to diagnose cause you are not in front of it. sorry. I'm saying 120 cause that's what I'm guessing its at. but no matter what I change the tempo to,  the metronome stays steady at the same pace. I can put the tempo to 80 or 240 and the clicks on the metronome do not change. I realize there has been no reports of this cause I have searched everywhere. I do not howver see the tempo map anywhere. Anyway I'm going to reinstall Sonar and if that don't work, idk

found tempo map and that is in sync with what I change the tempo to. its the metronome. its not following this internal setting or clock or whatever. I have recorded 1000's of songs in sonar in the past 10 years. this has never happened

Weird one. Does the audible click sync visually with the Now time cursor position in the timeline?
 
In any case, I would suggest:
 
- Test with a new project from Blank or Basic template.
- Check that Playback and Record Timing Masters are set to channels of the intended interface in Preferences (more likely to get fouled up with WDM driver mode).
- Try switching between ASIO and WDM drivers, whichever you're currently using.
 
Afterthought: Try renaming AUD.INI; SONAR will build a new one with default settings on startup.

I reinstalled . still not working.

ill just have to use session drummer as my click track

Is the problem similar with both audio and MIDI metronome?

Did you delete old registry keys? This is for the latest version, but I believe that by changing name to SONAR 7 instead of Platinum you will clean up the registry for a new install.
https://www.cakewalk.com/Support/Knowledge-Base/2007013392/SONAR-2015-Clean-Install-Instructions
Hope it helps.
All the best.