"A normal step two of a Spot Turn is a weight transfer in place, the toe still turns out. It is not a Walk we have not taken two steps by then, only one and a replacement."
Whether the second step is a walk or a replacement it is still a step. That is why Laird calls it 'step 2'. I would accept a full turn being completed by that time, so if you have been treating that step and replacement as all part of step 1, and saying that a complete turn is made by that point, then that is where our mis-understanding has happened.
"If I were you I would get that Phantom Walk you have introduced on beat three sorted out."
I have introduced nothing. The execution of the figure has changed over the twenty or more years since Laird wrote his description. To quote the current ISTD manual for rumba, "Spot turns are three forward steps danced solo by man and/or lady circling to L or R." They go on to say in effect that leaving the foot in place as described by Laird is an acceptable alternative.
"There should be no difference regardless of whether it is a Walk or a Checked Walk."
I refer you to page 10 of your favourite book, where Laird lists four differences between a forward walk and a checked forward walk. Toe turnout is item 4.