This is something you should tell your dark green person 

This is more something you should tell your dark green person 

The sites other than WoP are paid for by the community.

I don't agree with it, as it is not a canon thing. Salazar Slytherin was blood fanatic and didn't allow muggleborn students into his house. The sorting hat was enchanted long ago and therefore takes that into account. Even halfblood witches and wizards had troubles being in the house, if you look at Snape. If Tom Riddle had known about his bloodstatus, then he would probably have been treated differently, but he thought he was pureblood.
I don't see why this should change. Doesn't fit canon.

I agree that there needs to be Rival/Enemy, but twin is not really needed, when there is sibling already, so just look at the age. Mentor could be possible, but not really needed.

try to read the message I wrote

push

The way to get around the extra spacing is simple.
If you just press enter once, then it is like in coding where you add a paragraph. This is a thing for both, where if you hold shift and then press enter, then it will go down on the next line and will not have extra space. The reason that there will be like two to three lines of space is because there was pressed enter twice, which just needed to be one. Unless it was that you held shift down.
It is basically just a difference between a <p>text</p> or <p>text<br/>text</p>.

message your MoM on your site

Yeah, the success rate is low even though you have a recipe. Though it is still a lot better than without.