We've removed the duplicates for Harley/Ivy and Bart/Cissie. For the other two, they're not true duplicates. DCU and Marvel have an exception to the usual rule because of the nature of the medium. Because comic book runs can be written by different authors, a character may be written in one run differently to another. To recognize that, we allowed comics fans to be able to specify runs in the disambiguation. It's a bit weird, but it was the only way we could think of to make it work and to address the needs of all comics fans!