Undertray bolts stuck + jack stand points

Hello all!

Just bought a 2012 Freelander 2 TD4 Diesel SE a couple months ago. Car has good service history, only driven 130,000km.

1. I'm trying to change coolant, but can't undo any of the 6 bolts for the front undertray. Tried to hammer out rust, heat up bolts, spray with WD-40, different wrenches, etc. Can't even get any to turn 0.00001%. All 6 are jammed. Starting to wonder if this is normal? Spent 2 hours trying to undo any of the 6 bolts and got nowhere. Bolts even gaslighted me into watching a wrench tutorial again to see if I was doing it correctly

2. I applied two jack stands to "2" below. Except the one on the front right side of car collapsed into the point a little bit and now the point on car looks damaged and dented into itself. Starting to wonder if this guide below is correct as never had that on a car before. I've seen the Haynes video at 0:37 here:

They apply the stand to a point that's not in the guide below. And completely ignore number 2. I also don't see a number 3 point anywhere so I assume this guide below is not for a 2012 Freelander 2. I also jack the car up at point 1 with my trolley jack, then can't fit my jack stand in point 2 because the trolley jack is in the way anyway, so have to angle the trolley jack sideways and still, the stand barely has room to be placed at point 2. I believe I'm jacking the car up incorrectly, but I'm following the guides/videos 100% so unsure what it is that's wrong. How does everyone else jack the car up?

Thanks for your time

No not normal for the undertray bolts to be seized. It's probably had the oil sucked out, rather than drained via the sump plug. If the sump guard is removed every oil change, they don't have time to rust in, but also a bit lubrication on them when refitting doesn't go amiss.

The rear subframe mounting bolt head can be used for support, but the correct type of stand is needed. I use blocks of wood for supporting vehicles, as they conform to the body a bit, spreading the load over a larger area than stands.
Also use a trolley jack with a large rubber topped platform, not the tiny all metal head jacks available from car discount stores.
Jacking points No2 are for a specific shape of jack, and shouldn't be use for lifting or supporting, unless you have the correct shape platform.