Try touching and holding the either the time ramaining or the KM. This will bring up a Data Fields selection window. From here you can select the actual data fields you want displayed. Time Left is on there. You can actually choose from Destination, Waypoint or General fields to drop in the 1 of 3 data slots. Below is the breakdown of the data choices. You can also touch to toggle between those your have selected as favorites to be displayed on the Map.
Destination - Distance, Time Left and Arrival Time
Waypoints - Distance, Time Left and Arrival Time
General - Speed, Speed Limit, Time, Altitude.
Street Navigation takes alot more complex planning and calculations for streets, street types. If it is not planning the route you see as the fastest or shortest, try going to More... from the start up screen. Then select Settings, arrow down and select Route Settings. Here you can change the Route Planning Mode to Fast, Green, Short or Easy. You can also use the check boxes below that to select or deselt items such as Tollways, Ferries, HOV and etc. This should really help out. Most that use the iFly Street really love it, especially when coming from a Tom Tom or Garmin Nuvi. It just offers so much customization. I hope this helps.