Temping and Ovulation?

I am so confused right now glow had me ovulating on Oct 24th but according to what my bbt chart says now they have changed it to Oct 22 my chart shows a dip in temp on two days Oct 20 - 21 temp was 97.9 then a rise on Oct 22nd which was 98.1 and its been rising every since today it's 98.4 which day do you think that I ovulated on and can ovulation occur between two days depending on what time it starts originally? Glow changed my chart just this morning and hasn't marked ovulation on my chart with the red ovulation sign how do you get that sign to come on your chart I have never had one?