Not sure if it's normal, but good to hear it's much nicer. Mine is driving like a bag of nails at the moment, but I don't think my alignment was done well when I lowered it. I've also considered replacing all control arms etc to renew it all.
Pretty sure the mechanic would've tightened up the correct way. Sitting maybe 10mm higher than I'm used to on the factory Sports suspension, probably is how it should be then?