I have run 1 pump 2 reels now for 3 maybe 4 years i cant remember, but still same pump, and this was a second hand shuflo pump to.
No problem at all, T off after your pump, add yourself a seperate reel for about £100 and save the £150 odd on pump and controller, YOU DONT NEED IT
Some people over complicate things...its a pump, it pumps water, doesnt know where its going! It just pumps the water whether it be one reel or 2 reels. You may notice a rise in pressure on the one reel if the other unplugs, but if your working together properly youll both unplug roughly the same time anyway...