It's been a while so I'm a bit rusty on this and it's hard to google for, but usually when you have "volume vwap" it means "vwap in volume time", ie something l

It's been a while so I'm a bit rusty on this and it's hard to google for, but usually when you have "volume vwap" it means "vwap in volume time", ie something like say my order is for 100 shares, then vvwap is the volume-weighted average price over the time taken on average to execute 100 shares. In this case, as you say, the "daily vwap" is the vwap over the day each day, and then they are using the volume on each day to make a vwap of those over the longer period. I think. This is the kind of thing where when I was in securities the documentation would usually include the formula to disambiguate.