This is on the right direction but to get only one array to be output in the array aggregator the source module of the aggregator must output only one operation. You see the operation counts on the preceding are more than 1 so when you do this it is essentially processing the subequent operation and aggregating whatever appears in that operation.
This can be tricky as you will have a module that generates multiple operations and as a result the rest of the modules operate that much, so at some point you’ll need to get a module to execute only one operation and use that as a source for the aggregator.
I made a video that shows this.