If I set useCssRight to true,I get wrong top value

[LJJCherry]

<Align target={this.getTarget} align={{points: points, offset: offset, useCssRight: true}} onAlign={this.onAlign.bind(this)} > I met some strange problem,If I dont use 'useCssRight',the position defaults to using left and top in poistion absolute,If I use that, it became use right,but get wrong top value