You can deactivate QM for various material movements in configuration.
So look at the material movement you use for your STO and look at what you use for the internal storage location to storage location (Maybe 411?). Then disable QM for that movement type that you don't want inspection lots created for.
If you need to use the same movement type for more than one purpose, make a copy of it to say 911. Than deactivate QM for one or the other. Than train your customers to use the proper movement type in the proper situation.
FF