Node values problems

Kiddo

I do a transient conduction analysis(about 200 run steps and residual target is 1E-4). There're two domains, inner and outer.(the inner one is fully inside the outer one)and the mesh nodes are fully matched at interface(created by ICEM_CFD simultaneously). I export both the domains' temperature data and I found that the temperature at interface nodes are slightly different in different domain!For example: for inner domain x1,y1,z1 359.4359 DegC . . for outer domain x1,y1,z1 359.4285 DegC (note: same coordinate) The temperature should be same for the same node in different domain, right? Thanks for response.