I talked with the Homeschool Advisor, who has a doctorate in math, and he advised the following...
If the student is college bound continue with the original sequence (no separate Geometry course...Alg 1, 2, Adv Math). As long as you finish with Advance Math book, you will cover all the same Geometry as the separate book. (30% in Algebra I, 30% in Algebra II and 40% in Advanced Math) He recommended listing the Advanced math as "Geometry/Trigonometry" on the transcripts to satisfy the admissions counselors.
If not college bound (such as Tech school), then he advised taking this separate Geometry course.
He said the only reason this course was added was to appease the school teachers.
Please feel free to call the 800 number to Saxon and ask for the "Homeschool Advisor". They were extremely nice and helpful