SECONDARY FLIGHT PLAN

[Sdwr87]

I apologise if this is user error but I can't seem construct a fresh secondary flight plan while in flight. After filling out the INIT page with the basic details, I try to input the airways and points of my back-up route and, when I do, it takes me to the active flight plan page and starts messing with the active plan. SEC page allows for inputting SIDs and STARs just fine but as soon as I start trying to input waypoints and their corresponding airways, I get kicked onto the active flight plan page. Thought it worth mentioning in case it's a bug.