This page lists known issues with the latest version of Exivity. All isues that are resolved and released are mentioned under the Releases section
When configuring a prorated monthly service, and then applying a relative quantity discount (adjustment), in certain cases the total charge can be less than 0 resulting in a credit. Although this might be an unusual configuration and might not always happen, it is important to be aware of this behaviour.
This issue is pending. (internal reference: EXVT-1337)