Hi Carol,
I think there aren't Overhand Knots in the Emerald Knot structure (as in the Diamond Knot) and the "cycle" / "imaginary profile" is without regard for the cross points. So, I think
1. you did it right,
2. maybe Ashley was wrong (was not so clear) to say that #754 shows the cycle of #745 and also of #752 (and in #752 there are Overhand Knots) (but without regard for the cross points the cycle (in 2 dimensions) is the same!)
3. your technique is not wrong
About your knot, is it a #752 without tucking the ends?
You could consider a knot based on the Footrope Knot, something like a Crown and a Double Wall or a Crown and Diamond...for instance #708...
or what about #742, #743?
Hope this helps.
Ciao,
s.