You have to have something changing it in your project. All you need to do is look over your entire signal chain and check each gain stage. Sonar doesn't change your volume and DB levels without you telling it to do so.
Also, I noticed someone said tracks go to buses (Euwwhhhh?????) Do this below
1. Tracks go to the Master bus, not buses.
2. Sends go to buses
3. Buses go to Master bus
4. Master goes to Main outs 1/2
CJ