Things like that are typical in Focuses, I have one myself and I had recently replaced my driver side suspsension. The big reason to all your problems is that some of the parts in your car have been made in Japan. And one thing about Japanese companies is that they dont sort out their metal before melting it, so you have various metals in their parts when their manufactured, which can reduce the overall strength of the part. Its possible that your alignment can be affected by your suspension, check your sablizer bar and see if it is mounted correctly. For your suspension system, if it does go bad again, get Duralast brand. I haven't had problems with my car since I got that brand, they're US made and you can grease the suspension system for more lubrication unlike Ford factory parts. In intrest to your tires, I would replace them as soon as possible. The cheapest brand that I can tell you would have to be Falken tires from Discount Tire Co. The next best brand is either Goodyear, Nitto, or Yokohama.
