Petronelle d'Auxerre de Gâtinais, Comtesse de Anjou - Charlemagne is my alleged ancestor

geni.com has Charlemagne as my ancestor by various circuitous routes. When I check the ancestors out, using Wikipedia, anD other sources, I find that somewhere along the line the ancestors cannot be verified. If these ancestors have no provenance they should not be posted on the web-site. Very disappointing to follow through with these lineages only to find they have no proven veracity.