Certain software cannot be installed through Managed Software Delivery Policy however the status shows success. The same software can be installed through Quick Delivery task.
Software Management Solution version 7.x.x and 8.x.x
There is a compliance check involved in case of Package Delivery Task. If the compliance check succeeds due to any reason the install will not start and send the status as success. There is no compliance check for Quick Delivery Task, so it will always attempt the install.
It is recommended to use Quick Delivery Task for a software with this kind of an issue.