yes I am new to substance painter

and I am having trouble to see the UVs in correct list.
I basically created a clothing in Marvelous designer, created the UIDMs, then exported to zbrush and worked there and make sure I kept the UVs, but now when I open in substance painter even I see the UVs on the second screen, there are 4 Uvs, it just loads as one which says defaultmat. I also opened the original obj file from marvelous designer, that opens up with Uv list, but not the one that i worked on zbrush.. How can I separate them into 4 as they are? or where I did I do wrong while I was exporting you think.. couldn't figure it out. if you have any idea, please let me know. Thanks!!