Each arrow must be set correctly for Waze to route correctly. Initial turn restrictions on roads that are imported by Waze, are set automatically by the Waze routing engine. At the moment these are called Soft turns. They are not yet confirmed manually by an editor and you can recognize them at the little question mark next to it. The soft turns can be altered by the routing engine, based on the driving activity. Manually set turns will never be altered by the routing engin. Unfortunately, both automatic and manually restricted turns are represented by red arrows and cannot be distinguished. Currently, when you use the option to enable all turns, it will not fully change the routing from automatic to manual setting, leaving possible so called RevCons. To clear these, select the junction with the mouse. Then, in the left menu pane, click the link to "Disallow all turns" and then "Allow all turns". Alternately you can use the keyboard shortcuts, by pressing the letter q to disallow all connections, followed by w to allow all connections.