Just an update. I think I finally have it working good with all 6 sensors.
I tried everything you mentioned Scott and I was able to get one or two more sensors to work. I tried the RC that the link talked about and maybe some thing else, still didn't want to work.
Also from that link it said to stay away from Star topology. That is how mine is setup though I'm not going the distance that they talk about. I was dreading having to change it and they said to use cat5 cable, I'm using stereo cables, just made things easier to connect.
Well I finally ended up giving the sensors their own power. I am using a small bread board that you can solder on, https://www.adafruit.com/products/1608 which all my sensor wires go to. I ran my 9v supply to the board and put in a 5 volt regulator. Connected a power cable to the same place as the 9v input on the board and plugged it into the Esquilo. Ran the 5v line to the positive wires on the sensors, the negative to the negative wires on the sensors. Put a 4.7k resister between 5v and the data lines for the sensors. At first it didn't work with all of them hooked up but then used a lower 2.2k resister Scott suggested and everything is working now.
Using the one 9v transformer for both has given me a common ground so I don't have to worry about that if I had two different transformers supplying power.
Hopefully it will continue to work when I set this up on our Anodizing line to monitor temperatures of the tanks.
If I have to build one again I'll use the cat5 and the configuration that they say to use in the link Scott provided.
It would have been nice of them to mention this in the data sheet for the sensors, I probably wouldn't have had to go through all this.
I think my up down buttons are working for my 4 line lcd though it is a bit slow. Have some minor changes to try and speed it up and make it move more fluid rather than clearing the screen and writing the next 4 sensors to the screen.
Now have to get my web interface updated for all 6 sensors and I will be good to go I hope.
Thanks Scott for all your help.