could you send a screen shot of this. I've used If statement to generate title of the filter panel no problem.
If your filter content is based on an If statement (i.e. for translation purposes) please be aware any filtering on it will display the full condition for its display not an alias. It is because you are filtering on the data model as a whole not just on that object.
When you filter you are filtering the underlying data model not a particular chart. If you filter on year for example all charts using data associated to year will adjust according. It is this that appearss in the selection ribbon. If you were able to alias this it would lean t oduplicate filters. You will have to live with it for the time being.