Sheet DPS

I'm not certain what is causing this, but the sheet dps for Skeletal Storm Mages is bugged. I've been looking at different combinations of dps using 4 of the 5 following support gems. The dps number is changing with the exact same support gems depending on which socket the support gem is in as well as which support gems was actively removed.
- Feeding Frenzy
- Arcane Tempo
- Elemental Focus
- Minion Mastery
- Lightning Mastery