hope you "drove it like you stole it!" to go with the alarm blasting
i'm no expert but some of the things you are describing could be because of the immobilizer getting wet. this could happen if you have moisture under the seat you should start by checking there. a known problem with these cars is the little drain hole for the top on the left and right side get's clogged and then water ends up in the car. if you put the top in service mode check on both sides, right around where the top transmissions are and look around the foam cover if the drain holes are clogged.