Kerbal Space Program

Generally, when you make the bug itself on the tracker, you do NOT mark it as confirmed. That is reserved for when someone else can confirm the problem. It helps to show that you aren't the only one with the issue.

However, I do not believe this is actually a bug. Here is likely the intended workflow, compatable for both spaceplanes and some rockets:

Engines on - Liftoff - Gear up - Transit - Gear down - Touchdown

I believe that the gear buttons, etc. work the same way as mechinisms do in the game Dwarf Fortress, as in everything responds to the state change to a state rather then to the absolute state the button/lever/whatever is in. Know that you can manually extend/retract gear and landing struts (in KSP). That would desync their state to that of the button. So the optimal solution would be to have the button state change actually do everything - when it unpresses, it retracts everything, and when it presses, it extends everything.

It might be a feature request to desire the ability to set the default state, but the desync is not a bug, but rather a result of the underlying framework, and can't be worked around (with respect to fixing a bug).

In fact, it's a consequence of the existing system used for that UI, thus it is pretty much a bug or at the least feedback.
Regardless, this issue is actually a duplicate of another, so I've marked it as such for the moment.
Thanks for reporting it.