Did I ovulate?

This is so strange to me, because last cycle I ovulated cycle day 18 (bbt confirmed), and my temp spike was much higher. But today, according to ferometer app, which syncs my bbt thru it’s digital thermometer it says it confirmed ovulation on the 11th, day 11 of my cycle. I did have lots of EWCM those days and got my highest readings on opks but I am still thinking this sounds odd. Any insight appreciated, here is my chart. Cover line added by the app. Also I’m 35 and my cycles are shorter than they used to be, 24-27 days on avg...if that makes any difference.