How come my Unique Balrog Blade got THESE variables?

[newb-newb-newb2]

How come my Unique Balrog Blade got THESE variables?

My Unique Balrog Blade, which Mephisto dropped one minute ago, have +3 to Inferno!
On Arreat Summit it says the variable goes from +12-18. Why did this happen? I'm Single Player BTW, if that could have any effect on this.

 

[discoboomer]

Flamebellow: - Sorceresses will have a cap of +3 on this skill rather than the full number. Read more about it on

read the bottom of the page at arreat

 

[newb-newb-newb2]

Phew... I knew about the cap, but I thought the item would still show the actual variable. Thanks.

 

[Ryshenron]

yeh so if u look at it with another char it will how a diff number