parser doesn't track shaowflare
parser doesn't track dots extended by contagion (it's as if you don't have any dots up during the extended time)
parser doesn't track empowered dots (only counts them as normal dots)
parser doesn't track crit dots
and most importantly
parser doesn't track BANE or any kind of multi dotting! if you bane, parser will just track single target dot and won't count your AoE dot hits.
on a single target dps, the parser ignores a total of 1405 potency per minute. which could be around 60 dps on your current gear, it is ignoring a LOT more on multi target/aoe fights.