As far as roads not appearing in the client, there are no currently known issues of that sort. Please post specific examples (client screenshots) and the corresponding permalinks from the editor.
Via my iPhone 3GS.
Two examples of roads not appearing in the client, selected segments on the map are not shown in the client or they are incorrectly shown (no intersection, in first example).
Please, scroll down the screenshot images.
https://it.waze.com/editor/?lon=18.1746 ... ,182765358
https://it.waze.com/editor/?lon=18.1604 ... ,181492459