Limit to number of Oregon Scientific temperature sensors ?

Currently I have 6 Oregon Scientific temperature sensors. I have tried adding another one, but it started interfereing with other sensors. The one i tried to add has 3 channels, I tried all 3 different channels but it doesnt work. I would like to add 1 more sensor, is there a way of doing that ?
All the sensors i have are from different devices, 1 from a weather station, 1 from a clock, 3 from a Confort RAR501 multi zone weather station and another from a wireless thermometer. They all are either Oregon Scientific or work on the same protocol

There is a limit, but it depend of the types of sensors. To identify a specific sensor, the plugin relies on the type - See http://jeelabs.net/projects/cafe/wiki/Decoding_the_Oregon_Scientific_V2_protocol#Oregon-Scientific-sensors - for a list, and the “random code” assigned when batteries are inserted.

Or use my modification (http://forum.micasaverde.com/index.php/topic,4991.msg126316.html#msg126316) and get an address based on the selected channel.

The Oregon sensor “broadcast” every minute, so make sure they are spread out “on the minute” - check the log - probably only a problem if you have many sensor - I’m running with 8 sensors

I had just seen your modification but i am not entirely sure i understand it. I think i need some time to look at it again and try to understand what it does.
What do you mean by

The Oregon sensor “broadcast” every minute, so make sure they are spread out “on the minute”

and how can i change that ?
I am about to add another temperature sensor (I bought one of the 10 channel ones hoping it wont interfere with my existing ones), do you think i should change over to your mod ? If so, i just upload the xml file you posted to develop apps - upload luup file ? Will it recognise my existing sensors as i have logic attached to some of them
I have never changed batteries on any of them, it sounds as if i might run into problems once i do

Sorry for having so many questions…