Howdy! Make yourself comfortable. Have a look around. Feel free to continue to point out that I occasionally punt a sentence or misspell a word. I appreciate the opportunity to correct my mistakes. (I've only written, according to last count, five billion words on this blog. Some of them are bound to be wonky.)
That said, using the word "singular" to mean "one only; one and no more" is not incorrect, according to the OED. Neither would using it to mean "separate from others by reason of superiority or pre-eminence," again according to the OED.
This has been yet another example of why those who complain about other people's diction on the Internets are so insufferable.