The article is home sourced to the United Church of God which is a splinter group of Herbert Armstrong’s cultic World Wide Church of God, faithfully teaching his doctrines. Spiritual discernment is necessary regarding their definitions as they couch their terms using terms familiar to orthodox Christianity.
That's interesting language. You may want to read A Brief History of United Church of God
From that page:
Many of the current ministers and members of the United Church of God were once members of the Worldwide Church of God, a nonprofit corporation under the leadership of Herbert W. Armstrong until his death in 1986. A subsequent unwarranted shift toward nonbiblical practices and beliefs led numerous ministers and members to leave the fellowship of that organization.
Concerned with uneven administrative practices of the former assembly, more than 100 ordained ministers developed a new administrative structure that was more directly accountable to members and the ministry. A new 12-person Council of Elders, elected by a general assembly of all ordained ministers in United, was tasked with reviewing and independently documenting all core beliefs and doctrines of the Church, which above all must be true to the biblical record and not reliant on later divisive philosophical and theological traditions that were developed centuries after the original apostles.
Although many did consider Wordwide Church of God to be "cultic", United Church of God is not the same organization, doesn't have the same administrative structure, and doesn't have the same leadership.
Spiritual discernment is necessary regarding their definitions as they couch their terms using terms familiar to orthodox Christianity.
Spiritual discernment should be used for ALL religious teaching and should be verified that it matches up with scripture. Since you have no response to the article am I to assume you agree?