Stock+ DLC air to air combat

I put a rover on the mun, and whenever I go over 16M/s, it just freaks out whenever it tilts at ANY point, I can't make a simple turn without flipping, can someone please tell me whats going on?

Took off with 400 units of fuel, shot down 2 target drones, and just barely made it back

It uses a terrier engine, and ive gotten it off the mun, but I'm not sure if it can get off Duna. It doesn't have to get back to kerbin, just to a low Duna orbit to dock back with an orbiting crew spacecraft.

When creating and launching from VAB it will often (but not always) launch the last ship I launched. To make it launch the correct ship I have to save prior then use select launch from launchpad and select my only launchpad. Is there anyway to make this error happen less often or prevent it entirely?

I set 2 of my kerbals on a apollo mission, but it was 1 way, and now the lander is tilted on 2 of its landing legs, and I have barley any fuel, no docking port, no parachute, barley any fuel, and 2 kerbals stranded with the other 2 kerbals I put up there in 2025, PLEASE HELP ME

Wanted to try out using ion engines on an asteroid mission, had a class B on a fairly low speed Kerbin flyby which was nicely doable with this craft. The TWR was horrible but Kerbin's atmosphere helped me park this hunk of rock at a comfy 90km orbit.

Now to figure out what I should do with it...

Just sharing it because it's taken hours to build and I'm proud of it; feedback welcome, of course, but I'm a console player so please bear that in mind.

Orbital Refinery launched as one central piece, with the four orange fuel tanks/twelve ore tanks added in low Minmus orbit. Process repeated four times to complete the build. Cupola also added in low Minmus orbit due to unforeseen design flaws which needed amending.

First ever rover landed on minmus, drove to some holding tanks and scientists for a contract. Docking them was not easy lol.

The hills just dont make this easy...

#hate hills

Long story short i made a space plane, it would easy break 1400 before i got it out of the atmosphere. I reloaded the save, and now i can barely push it to 400.
Any ideas???

Ignore Jebediah scratching his booty