using the smoke jump sometimes it will jump a couple feet up before smoke bombing then go straight back down. sometimes it will count as used and sometimes it wont. also if u do it once oftentimes if u try to smoke bomb again it will do the same thing several times in a row.
I have noticed that there have been some occasions when I have been able to successfully smoke bomb jump several times in succession. I have not collected any churros to do this. I have specifically seen the red skill button remain at 100% full between two jumps.
I experienced this quite a few times. Sometimes I'll smoke bomb and I'll jump a few feet and instantly find myself back on the ground - and sometimes it even repeats. If I try to cloak quick after that, I'll be cloaked yet turrets can still see me. I'll try to de-cloak and cloak again and turrets still could see me.
I haven't done any double jumping, but I've seen someone do it. My issue with the smoke jump is it just plain doesn't work sometimes (a lot) As for cloak, might be lag or low cloak. Cloak one takes forever for full invis. Cloak two is a little better. Cloak three is almost instant.