Simple weapons proficiency not applied to all?

One of my current characters is a level 5 tiefling college of cuisine bard (Helinia's Guide to Monster Hunting). This 3rd party partnered subclass got dagger for starting weapon, but proficiency in simple weapons. An equipped dagger appears to follow the rule with +5 to hit. Other simple weapons (handaxe, sickle, etc.) only show up with +3 to hit when equipped. Am I missing anything? Should this be reported to support or just override to get requisite number? 

Thanks for clarifying! I've been playing for almost two years, but still learning new things.