SPRINKLER TALK FORUM - You Got Questions, We've Got Answers

We recently added a new section of sod to our acre and needed to add new sprinkler heads to that area, so we rented a ditch witch and tied into the existing heads closest to that area. The problem is that I ran into a 3/4 water line and about 8 red wires and one white one. I knew they were sprinkler lines, and since I'm quite familiar with electrical repair, thought I'd just splice them with some grease caps and shrink wrap. I was wrong.
1st problem: when I shut off the main valve in front of the control box, the 3/4 line keeps pumping water out, so I'm not sure if either the valve is the shutoff to the sprinkler system, or the 3/4 line is a sprinkler line. I had to shut off my main water line to get it to stop. The wires were running along side the 3/4 pipe, so it has to be sprinkler water line. I had to have water to my house, so I just got some more 3/4 pipe and slip fittings to fix it.
2nd problem: I decided to just splice all the red wires on one side to a matching red wire on the other side of the ditch. I wasn't worried about keeping the zone numbering, and figured I could just hook it all back up, turn each zone on, see where water was coming out, and slap a new number on that zone. I also spliced the 1 white wire back to itself.
So, after all the wires are spliced, we start going through the zones on the controller, and some zones work great, but some zones seem to have 2 zones of sprinklers on at once, and when we turn on a certain zone, it won't shut off, even when I turn the controller completely off, and since the main valve doesn't seem to work, you can't get the darn thing to turn off at all!
I can live with the 3/4 pipe shutoff problem. I'm planning on getting a valve for it and putting a box over it and the wires so I can just shut it off there. I can't live with the zones not shutting off because it will just waste water. The only way to shut them off is to take each red wire and touch it to all the other red wires on the other side until I find the right combination. After testing 64 wires, in a dirt ditch, I'm ready to pull my hair out!!
Any help as to how to trace the wires, or what wires I'm even tracing would be greatly appreciated. I have a multimeter and know how to use it. Is there anything else I should be using?
Thanks in advance!!