Why is there voltage out of the gate of my transitor
There are two culprits at work here:

If you charge the gate of a MOSFET using a voltage source and then disconnect the voltage source by a switch, the gate will not go back to 0V. There is a charged capacitaor at the gate and that capacitor will retain it's charge indefinitely (except in real life, where there is a phenomenon called gate leakage). So, you can charge turn on this circuit, and it will most probably stay turned on forever.

However, if in the initial condition, the 3.3V is still there, this is a shortcoming of the simulator you're using. Floating nodes are basically impossible for the simulator to solve, so generally, what is done is that it is connected to the circuit ground by using a very large resistor (denoted by gmin in SPICE like simulators). This sets the initial value of the floating node to 0, and you may have other options to use to actually set the initial value of the floating node depending on your simulator. This may not be implemented correctly in your simulator of choice.

I'd advise you to try and learn a better SPICE based simulator. LTspice from Linear Technologies is a great freeware circuit simulator that is beyond the capabilities of a toy.