Actually per Verckys in his recent interview with Naty Lokole, they had reconciled their differences in Beligum last year after decades of a cold war feud. He even played sax for a part of his new album project. Verckys used his reputation of being one of the most gifted African musician and producer to embezzle vast amounts of money from artists he's produced and from various organizations.
Mère Amazone was apparently not informed, which is why she reacted the way she did when she first saw him paying respects. She has since calmed down and met with him in private.
Regarding Koffi, they had a polar relationship over the years - things were either alright or really negative for seemingly every reason under the sun. The final straw was after 2009, when Koffi took legal action against Wemba. He was appalled that his pire petit would do such a thing and vowed, pounding his chest, that he'd never forget or forgive this time. He told family and friends that he shall not be welcome at his funeral.