As long as the step number is correct, don't worry about it. This has been an annoying bug for a while. It actually picks the description of the first entry that matches the step number. So, if you create a step number that does not already exist (maybe 77), you will see that your description will show up. Another solution will be to delete the standard-delivered steps. However, if you create step 10 for two CR types, your BRF+ will always show the description of the first one.
So, bottom line, don't worry about it as long as you are sure the number exists for your CR type.