Troi was a Lt. Cmdr. in "Encounter at Farpoint".Wait... Troi was a LT. in Farpoint? I didn't remember that. So she advanced twice in the show? & of course Geordi & Worf did as well... So pretty much all of them reached or surpassed Data's rank by the end of the show/1st movie? Riker had been offered 3 ships, Picard offered 2 admiralties, Beverly, the head of starfleet medical.
Everyone on that senior staff got at least offered if not outright took major leaps in advancement during their time together but Data. Geez, If Ro Laren hadn't gone Maqui-ish, she probably could've gotten a bump to Data's rank & took Worf's job when he left for DS9. Doesn't even Barclay get a bump to LT. Cdr. eventually?![]()
Perhaps you are thinking of Riker saying, "You have your orders, Lt" right after Troi gets concerned for his safety when he decides to go to the Bandi city. But her pips are Lt. Cmdr. ones throughout the pilot, and also every time she wears the uniform until her promotion at the end of "Thine Own Self" in season 7.
Data did stay at that rank for 15 YEARS! (7 years on TNG, the 8 years afterward until NEMESIS.) Completely egregious and wrong.