Existing research shows that older people with severe mental health problems need different forms of support in daily life and in the community to lead an active and meaningful life. A common form of support for people with severe mental health problems in Sweden is attendance at community-based day centres (DCs). However, knowledge of staff and managers' experiences of how people ageing with severe mental health problems are supported in DCs is scarce. The aim was to explore DC staff and managers' experiences of how people ageing with severe mental health problems are supported in DCs during the retirement process. Telephone interviews were conducted with managers in 27 municipalities in southern Sweden. In addition, focus groups were held with personnel from a total of nine different DCs. The material was analysed using content analysis. The results showed that older people who receive support in community-based mental health care were viewed as a neglected group with complex needs, and the informants (managers and staff) had few policies to guide them when providing support. This made the informants desire more knowledge about best practices to support the target group. One theme emerged, Minding the gap between ideal and reality while working with a neglected group with complex needs, with three categories: Reasoning around unmet needs, Navigating in a muddled organisation, and Wishing for an enriched service. Together with previous research, the results can contribute to increase awareness about an overlooked group at risk of being neglected and the pitfalls that impact the possibility to guide this target group in their recovery journey. Further research focusing on the target group's own experience of their everyday life situations is also needed.