Blotches on pan?

Are those blotches rust? I did scrub clean with steel wool and dishwasher liquid and in between 2nd round of seasoning what am I doing wrong? Also I am not a 100 percent sure if this is carbon steel

And when I am coating a layer of oil with kitchen towel, the towel is turning black

Are those blotches rust? I did scrub clean with steel wool and dishwasher liquid and in between 2nd round of seasoning what am I doing wrong? Also I am not a 100 percent sure if this is carbon steel

And when I am coating a layer of oil with kitchen towel, the towel is turning black