Hi LeslieH4589 !
Thanks for reaching out to the Community! I followed the instructions you provided and was able to create a segment which I titled Support Test - LTE tag. It took a few minutes, but it did pull 18 contacts which matched the 18 people with that tag. You are running the segment exactly right, and I would expect it to have worked without issue.
We will need some additional information to help us determine what caused the segment to not work properly:
Did you get any kind of error or messaging?
Did you have the same issue when you ran the other two segments?
Did you add or remove contacts from the tag after you ran the segment?
Did you refresh the segment at any time?
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