My DD2 pooed immense quantities of yellow-orange liquid stuff, all the way until she started solids. It had a mild smell, but it was really really runny. Anyway, she's fine. DS did thick yellow stuff with little bits in it, that would be soft but not liquidy. DD1 did this soft yellow stuff that looked like mustard. That was most of the time. But we had everything in the spectrum, from brown to green to yellow to orange to a pale tan color, depending on what I'd been eating and how much they were nursing and what color shirt I was wearing and how many airplanes flew over that day. (In other words, there was no real pattern to it.)
I think that the main reason we look for yellow seedy poo is to make sure baby is getting enough fat for adequate growth. With a baby that's gaining well, you don't have to worry about that. I think you're fine!