Nor sure about the clicking mate.
As for the fuel comsumption, sounds about right to me, I average around 30mpg around town, and 36-38 on along run, you do however not say how many miles you get out of ?30 of petrol.
The veering to the left sounds to me that you tracking / camber is now way out due to you having lowered your car. I would advse you taking your car to a competent garage to get the tracking / camber looked at.
You need to host the pictures on some webspace, or by using photobuket.com, then add the link to the picture in your post, if you want further guidence or me to host the pics for you let me know, either here or via pm.
Hope this helps with at least a few of your queries.
Paul