Question?

Wright's coefficient on pedigree is 28.125%

You state the following?
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Like any tool, the Wright’s Inbreeding Coefficient has very good practical use, but it should not be misused or misunderstood. Two dogs out of the same litter may share the same theoretical WIC “on paper” ... but IN THE REAL WORLD one dog may happen to carry with it a substantially-greater “pull” from one side of its pedigree than its littermate brother or sister. For instance, Laguna Sunrise and Jezebel were littermates out of the same litter of Poncho to Screamer. Therefore, “on paper” these two sisters have “an identical” WIC. However, the physical reality is Laguna Sunrise carries a much greater “Hollingsworth” (or even Red Baby) GENETIC PULL AND EXPRESSION than did her sister Jezebel, who carried a much stronger “Poncho” pull in her actual physical expression and characteristics. So, again, use the Wright’s Inbreeding Coefficient as a tool, but do not be blinded by this tool; use your eyes in conjunction with it.

In closing, as a general rule, a coefficient of 10% (or less) is a scatter-bred dog (or possibly a 100% straight outcross), where there is little relatedness in common amongst the entirety of BOTH parents’ ancestries. A 10%-20% WIC is a somewhat linebred dog. Coefficients of 20%-35% are getting into some solid linebreeding in the genetic background, and anything with over a 35% WIC. is an intensely inbred/linebred animal.
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Just a question. I would read it as inbred or intensely line bred. But how do you reconcile it with the coefficient.
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I did read the whole article. I am however asking about a specific reasoning in this case