Why are the K-thermocouple values (first DAQmx channel) are wrong after creating second (voltage type) DAQmx channel?

I am trying to Creating an Analog Input Task with Multiple Measurement Types: Voltage and K-thermocouples (the system is PCI6034E – SCXI1000 –SCXI1122-SCXI1322). It does not work properly: as soon as I add second "DAQmx create channel" for voltage I start reading wrong K-thermocouple values (100-160 deg C instead of 24.3-24.7) and it does not depend on sampling rate, etc. The Labview example "Multiplechannels_Created.vi" gives me same wrong temperatures. Did somebody meet this problem? Thanks.

Lorne,
Thank you, for detail explanation about temperature shift.
I am sorry for confusion. The program, which was attached in my previous message: DAQ_Task is not working properly with my hardware as I have already described it above. Do you have any ideas where can it be a problem: PCI6034E?, Chasse?, thermocouples?, Computer?
As I mentioned, currently, another approach for Temperature and Voltage data acquisition (see attached file) is realized, but it will be not suitable for fast data acquisition tasks.
With best regards,
Donatas
Attachments:
Data_Log.zip ‏144 KB

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Why are the K-thermoco​uple values (first DAQmx channel) are wrong after creating second (voltage type) DAQmx channel?

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Why are the K-thermocouple values (first DAQmx channel) are wrong after creating second (voltage type) DAQmx channel?