I highly doubt that running through 2 cycles saves energy compared to doing it right the first time.
Kinda like a dumb tech support q.: you're cleaning out the lint filter before each use, right? :)
Second: are you sure it's your dryer? Maybe the washer isn't spinning them as dry as they need to be. Try using a washer cycle that spins harder/longer. Did you replace only the dryer w/o replacing the washer.
The duct was jammed full of lint. So, no air was flowing out. The dryer had a safety interlock that disabled the heater. This is why the clothes took so long to dry. It is also why we didn't start a fire and burn down the house.
Now we clean the ducts every 18 months and the dryer works great.
The guy at the applicance store was completely sympathetic; he hears it all the time. The washers are a widespread disappointment.
As a counter point, I have a front-load 2011 Samsung washer and dryer. I even got some money from the Big Evil Government water district for the washer and IIRC from the Big Evil Power Company for the dryer.
I am 200% satisfied with the wash and drying quality. It will take quite a bit to convince me that energy efficiency requirements are causing problems.