Modifying Labor Distribution to Jobs after Posting

On occasion when we save admin hours or other misc hours (ex. non project work) under labor distribution to jobs, it doesn't actually save the information but instead allow you to save the entry, then after reopening, the entry is missing.

Sage support mentions this is because the "overdistributed hours" is popping up causing an issue, however my other coworker insists that this is how it's always been and the overdistributed hours shouldn't have an effect on the ability to track admin hours etc in the Labor Distribution to Jobs.

Is there any way around this?