Convert decimal Duration to meaningful data

Hi

I have the below data, that in PQ is set to duration, and shows the number of minutes per interaction. However, in Dax it shows as a decimal. 

That's fine when it is its own visualisation / query, and it displays on the clustered column chart as "Interactions" - a sum of minutes to show hours: 

But, if I then include a second second query's "Duration", which has the same setup and similarly linked x axis slots, this happens:

I've determined that this univeral figure across all the slots is because it's treating it as a decimal, or so it seems. But how do I get this second set of values. The values should be slightly higher than "Interactions" because there are more staff providing support during any period than are required...it should show something like this (done by creating two visualisations and placing one over the other. I'm aware that this is a stacked and not clustered, but you can see the point I'm trying to illustrate. Both queries' "Duration" and "interactions" should be being measured against time, not a decimal value. But no matter which way round I try, it never looks correct. 

I've asked this question on another topic, but I don't think I explained myself properly and the thread appears to have gone cold. Help!!