How to order dependent fields?

[SjoerdManger]

Hi there guys!

I've just created a form but I'm having trouble ordering one of its dependent fields, here's a snippet of the form.

How can I make it so that the order of the form is such that the dependent fields, in this case "sample_type" and "storage_temperature" are shown below "someOtherVariable" and "yetAnotherVariable", not below "datatype" as its default behavior? Adding the order in "ui:order" doesn't seem to work in this case. Any thoughts?

Thanks in advance!