Guilin Sun
Ansys Employee

In general, TE/TM is not uniquely defined. Actually they can be opposit as you observed.

 

BTW: I wrote a post in Chinese regarding to this. If you can use google translate please have a look: https://forum.ansys.com/forums/topic/ansys-insight-youguantetmpianzhenyijimoshiguangyuandewenti/#post-176494