Add a left property to the bar to ensure it is always correctly aligned

dist/rzslider.css

@@ -33,6 +33,7 @@ rzslider span.rz-base {
 }
 
 rzslider span.rz-bar-wrapper {
+  left: 0;
   width: 100%;
   height: 32px;
   padding-top: 16px;
@@ -41,6 +42,7 @@ rzslider span.rz-bar-wrapper {
 }
 
 rzslider span.rz-bar {
+  left: 0;
   z-index: 0;
   width: 100%;
   height: 4px;

dist/rzslider.min.css

-/*! jusas-angularjs-slider - v0.1.23 - (c) Rafal Zajac <rzajac@gmail.com>, Jussi Saarivirta <jusasi@gmail.com>, Angelin Sirbu <angelin.sirbu@gmail.com>, https://github.com/rzajac/angularjs-slider.git - 2015-07-28 */
-rzslider{position:relative;display:inline-block;width:100%;height:4px;margin:30px 0 15px 0;vertical-align:middle}rzslider span{position:absolute;display:inline-block;white-space:nowrap}rzslider span.rz-base{width:100%;height:100%;padding:0}rzslider span.rz-bar-wrapper{width:100%;height:32px;padding-top:16px;margin-top:-16px;box-sizing:border-box}rzslider span.rz-bar{z-index:0;width:100%;height:4px;background:#d8e0f3;-webkit-border-radius:2px;-moz-border-radius:2px;border-radius:2px}rzslider span.rz-bar.rz-selection{z-index:1;width:0;background:#0db9f0;-webkit-border-radius:2px;-moz-border-radius:2px;border-radius:2px}rzslider span.rz-pointer{top:-14px;z-index:2;width:32px;height:32px;cursor:pointer;background-color:#0db9f0;-webkit-border-radius:16px;-moz-border-radius:16px;border-radius:16px}rzslider span.rz-pointer:after{position:absolute;top:12px;left:12px;width:8px;height:8px;background:#fff;-webkit-border-radius:4px;-moz-border-radius:4px;border-radius:4px;content:''}rzslider span.rz-pointer:hover:after{background-color:#fff}rzslider span.rz-pointer.rz-active:after{background-color:#451aff}rzslider span.rz-bubble{top:-32px;padding:1px 3px;color:#55637d;cursor:default}rzslider span.rz-bubble.rz-selection{top:16px}rzslider span.rz-bubble.rz-limit{color:#55637d}
\ No newline at end of file
+/*! jusas-angularjs-slider - v0.1.23 - (c) Rafal Zajac <rzajac@gmail.com>, Jussi Saarivirta <jusasi@gmail.com>, Angelin Sirbu <angelin.sirbu@gmail.com>, https://github.com/rzajac/angularjs-slider.git - 2015-07-31 */
+rzslider{position:relative;display:inline-block;width:100%;height:4px;margin:30px 0 15px 0;vertical-align:middle}rzslider span{position:absolute;display:inline-block;white-space:nowrap}rzslider span.rz-base{width:100%;height:100%;padding:0}rzslider span.rz-bar-wrapper{left:0;width:100%;height:32px;padding-top:16px;margin-top:-16px;box-sizing:border-box}rzslider span.rz-bar{left:0;z-index:0;width:100%;height:4px;background:#d8e0f3;-webkit-border-radius:2px;-moz-border-radius:2px;border-radius:2px}rzslider span.rz-bar.rz-selection{z-index:1;width:0;background:#0db9f0;-webkit-border-radius:2px;-moz-border-radius:2px;border-radius:2px}rzslider span.rz-pointer{top:-14px;z-index:2;width:32px;height:32px;cursor:pointer;background-color:#0db9f0;-webkit-border-radius:16px;-moz-border-radius:16px;border-radius:16px}rzslider span.rz-pointer:after{position:absolute;top:12px;left:12px;width:8px;height:8px;background:#fff;-webkit-border-radius:4px;-moz-border-radius:4px;border-radius:4px;content:''}rzslider span.rz-pointer:hover:after{background-color:#fff}rzslider span.rz-pointer.rz-active:after{background-color:#451aff}rzslider span.rz-bubble{top:-32px;padding:1px 3px;color:#55637d;cursor:default}rzslider span.rz-bubble.rz-selection{top:16px}rzslider span.rz-bubble.rz-limit{color:#55637d}
\ No newline at end of file

rzslider.less

@@ -51,6 +51,7 @@ rzslider span.rz-base {
 }
 
 rzslider span.rz-bar-wrapper {
+  left: 0;
   box-sizing: border-box;
   margin-top: -@handleSize / 2;
   padding-top: @handleSize / 2;
@@ -59,6 +60,7 @@ rzslider span.rz-bar-wrapper {
 }
 
 rzslider span.rz-bar {
+  left: 0;
   width: 100%;
   height: @barHeight;
   z-index: 0;