The background: I baked bread a couple of days ago, and I was out of yeast, so I borrowed a couple of packets of Fleischmann's Instant Yeast from a neighbor. I'm used to dry active yeast, which requires two risings. My neighbor told me that with the instant yeast, she kneads for only five minutes instead of ten, skips the second rise and shapes her bread right after the first. I tried it her way, and I have to admit, it was the weirdest bread I've ever encountered. Even though the dough ended up smooth and elastic, the resulting bread was noticeably sweeter than my recipe, and it had a texture closer to cake than to bread.
The question: When using instant yeast, how many rises are needed to make a non-sweet bread? Do I have to stick with just one, or is it permissible to use two rises with this yeast? Definitely it needs more kneading, as my neighbor's recipe didn't form proper gluten chains, but should it have the second rise as well? Will something bizarre happen if I use two rises instead of one with instant yeast (asked as if this wasn't bizarre bread in itself)? Or should I just refrain from baking bread until I can get some proper -- read: dry active -- yeast?