Regarding the angle of the jets, it's because you have the angle adapter set at the wrong angle. I also found that the when the brush is set at the right angle, it doesn't look right because the extra bristles for the sills give the illusion that the brush should be set at a diffent angle, but if you could imagine that the bottom 3 rows of bristles went there, or that they don't need to come into contact with the glass, then you will be able to see why the brush angle needs to be lower than you have it set.
Also what version have you got, black or White. I have been using the White dual tri. For slot of first cleans and it still looks good, I decided not to got for the black, because although I like the feel of the bristles on the black extreme, they just army up for long term use, I sent back my first black extreme because it just looked awful after a weeks work, but I ended up buying another one for certain jobs, old leaded and a few georgian windows, but because it's not getting regular use it will last.
If you have the black version, I would recommend the White, I feels like it's cleans better than the White extreme because of the dual trim, but the bristles can take more of a hammering than the black.