webix.i18n.numberFormat does round values with wrong decimals.
As the snippets is based on webix 6.1.2 (and not 6.1.3) it does not work there.
But here is a sample.
Using 6.1.3 the webix.i18n.numberFormat makes "9.51" out of "9.5".
I think the problem existed already some versions ago...