DPS Calculation strange

hey, is the DPS Tool in the Skill tooltip a realiable source?
i am 31 atm and i found a new quiver which is clearly better but the DPS of my skills is decreased by 100-200 dps.

Old Quiver:

8% Increased Bow Attack Speed
9% Increased Physical Damage
+7 Bow Lightning Damage
+15% Chance to Ignite on Hit
+13% Physical Restistance

New Quiver:

9% Increased Bow Attack Speed
21% Increased Physical Damage
17% Increased Critical Strike Chance
6 Health on Kill
27% Poison Resistance

what did i miss? Or should i forget the Number in the Skill Tooltips?
I’m playing a Falconer Leveling Build with Fire Traps.
Thanks

maybe its the flat bow lightning damage

the new quiver only has %damage increase

i THINK that flat damage is added before the percentages

Always take tooltip DPS (and character screen numbers) with a grain of salt. They’re not always correct or take everything into account.