Keep in mind that lots of things could cause random STTNs - getting over illness or teething, immunizations (the only times that Dylan STTN under 1yo was after needles!), growing, a particularly active or exhausting day, more fresh air than normal, etc. You may drive yourself crazy trying to figure out how!
A feed at 10, and then another between 2 and 4 was pretty much what we were doing at this age. Our DF was between 10-1030, then Dylan would wake around 3 or 4 for a feed. So, TBH, I don't really see an issue with those nights...
That's just me though, because we decided to let Dylan drop his night feeds on his own when he was ready rather than actively weaning them. I know many moms do actively wean night feeds, but that just wasn't the right decision for us.
Whatever breastmilk or formula you add to solids that does count towards total milk intake for the day. Yogurt I'm not sure about; Dylan has a milk allergy so never dealt with that. I would hesitate to include it though as it won't have the complete nutritional compliment that breastmilk or formula do.
How did today go?