Thank you all for the answers. Lets see:
I'm still using 1.0.4. But yes, I don't get that weirdness too. Looks like S6 and S8 added are the S7.
Didn't knew that what I was doing was calles Aspargus. That was instructive.
So those ultra big rockets can't be made with keybodine? It bugs me because I can lift different parts of the ship and assemble it in space, so theoreticaly (for me at last) I should be abble to offer the same power to a huge rocket and it would go to the destination. Are my physics wrong? Because this guy did this LOL thing. https://www.youtube.com/watch?v=MA1ILgysnYE
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@Phil deCube
Liked your tank dumping system. What mod do you use for mining?
There are 6 satellites, one for each moon, that why it's so heavy. Refueling is an idea, but I'm too lazy for that haha.
It got huge as I was trying to fit those huge things with enough fuel. Aerodynamics play that much of a role? I read that I don't even need nose cones, only for aesthetics.
Good idea with the Spark, I didn't saw engine. That brings me to another doubt. How do I know how much fuel should I use depending of the engine? Too much and it doesn't move, too few and the engine weights too much and it doesn't move too.
You said too much TWR. Isn't it the more the better?
Will try the ideal too. EDIT: I tried it, got only 600 more delta V.