By default, created dimensions, even though created in the drawing, belong to the model. So any newly created dimensions will modify the model and you will need to check in the model also.
BUT...
There is a config.pro option,
create_drawing_dims_only YES
If you add this option to your config.pro, all dimensions created after this option was added will belong to the drawing and the model will not be changed.
WARNING: there are some things, that may be odd. In older releases of creo, GD&T created could not be attached to created dimensions when this option is on. Some of this has been fixed with the way GD&T is done now, so depending on your creo release, this solution may work for you.
