i know its a stupid question and i well feel realy stupid after but do the kids always look like their parents in the other ones they were completey random (or it seemed like it to me) but in this one i had one couple have 6 kids all 3 boys look the same and all 3 girls look the same am i unlucky or will it always turn out that way?

It's a legitimate question; after all none of us would like having 20 plus cloned kids running about. Yes, in the other VV games children were chosen at random. In VV3 the children take on the likeness of their parent(s). Sometimes they're complete clones other times not. Most likely, as you put it, it's due to bad luck.

Yes, inherited appearance was introduced in VV2. There is quite a discussion about it here.