Problem 1 - Did you make sure when you removed the fuel rail that all of the o-rings remained in place? Pull the fuel rail and make sure each injector tip and seat has an o-ring and they are in good condition. Replace if necessary.
Problem 2 - Weird. Haven't seen this one. Best I can say is remove the neg cable again and clean it and the post thoroughly and re-attach.
Problem 3 - Make sure the belt is seated correctly. When you press on the belt with mild pressure it should only deflect a 1/2 inch or so. If it deflects more, tighten it. If doesn't deflect then it's probably a bit tight.
'06 Jeep Wrangler, 65th Edition, stock.
'98 Jeep Wrangler, stock.