Had to install a Doubler on an ICC earlier this spring. Got called back today, found Doubler isn't working from controller, pulled and replaced it. Brought old one home and bench-tested it - it's fine. So I called Transitional, and the response was that when jumping stations across modules it causes interference in the controller and the controller will error. 1st thing that pops to mind is, why did it wait almost 3 months to error? It's been wired to zones 1 and 24 since about April. Anyone else encounter this issue?