Luis Alfonso's father wasn't considered to be a royal when he was born by the (exiled) Spanish Royal Family, because of the morganatic marriage of his parents.
Only his father, as claimant to the French Throne, considered his sons (Alfonso, the Duke of Cadiz, and Gonzalo) to be royals, and in quality of claimant King of France he gave them royal titles.
Alfonso had royal titles and status in Spain only because his grandfather in law General Franco gave him them; but the Royal Family - as well as the other branches of the House of Bourbon- never acknowledged them.
So, there's no reason because now the Spanish Royal Family should consider Luis Alfonso as Royal Highness and Duke of Anjou - they didn't in the past with his father, why should they do with him now?