Changing colours - repeating text

The CAD drawings I receive are often full of yellow text and dimensions in the model space (I know it's easy to see but wish people wouldn't use yellow). When I try to change the colour, the dimension lines change OK but the text is repeated in the new colour and the original text is not removed. I have no idea why this is occurring - even if I go into the dimstyle editor and change the colour it will do the same thing to every dimension, meaning I have to go and manually delete all the text/dimensions in the wrong colour. I can't seem to find a way around it, it is not common to a certain drawing structure it seems to happen for all drawings. I even believe these drawings have been generated from a more advanced solidworks program as opposed to AutoCAD. Here are two examples of what happens, the green is what I want, the yellow is what I don't want. Appreciate the help.