Dimension Number does not stay in desired position

When I create a dimension, the dimension numeral (e.g., 2.355 in) does not stay where I put it. If I drag it to one side of the dimensioning lines, it often jumps back to the other side! But I don't want it on the other side. How do I make Corel dimension numbers stay on the side I drag them to? Why do Corel dimension numbers seem to have a mind of their own with respect to position? Frustrating.