Yes, it's a UHF/VHF combo. The narrow end is the UHF section and must be pointed in the direction of the signals. The rear VHF element is droop and, if you have low VHF in your area, should be straightened carefully.
Scrap out the twin-lead entirely, it isn't worth screwing with and will cause false symptoms with digital signals, especially if it isn't correctly run. Install a 75/300 ohm matching transformer and connect a temporary length of RG6 (or QS) between the transformer and your TV or converter box. Walmart carries an inexpensive indoor matching transformer that you can use without waiting for a parts order to arrive. Radio Shack also carries one. Qualy of either isn't known, but they should get you started. If you do need an amplifier, don't buy it at either place unless you order it online and have it shipped to the store.
Replace the broken string so the antenna's boom is horizontal and make sure the front is pointed at Nashville. Your TVFool plot indicates you're in an obstructed valley, so don't expect reliable reception on your attic.