Puncture shows incorrect chance to bleed on character sheet

My SSF HC character, Saydhe, has a total of 55% chance to bleed from passive tree nodes. This appears correctly on the character sheet for the basic attack.

However, when looking at Puncture it also shows 55% chance to bleed. I would expect it to show like resists -- "100% (155%)" -- if not just as 155% or 100%.

Siege Ballista, with a Chance to Bleed Support gem shows correctly as 80%.

Is Puncture actually causing bleeds at 55%?

Or is the Chance to Inflict Bleeding line omitted on Puncture, because that's the nature of what it does, and have the additional sources of bleed chance created a new line that is essentially meaningless to the skill? Is the line overriding the skill's natural 100% chance to bleed?

Should likely have swapped Puncture out for Frenzy or something ages ago regardless, but I'm curious what's happening here.

Thanks.