I think the key there is unsightly / dangerous placement as the qualifier to the whole first part. A reasonable LL shouldn't pitch a fit about a single bike placed in such a way as to allow safe egress, especially if asked first. It's just to protect him from 1) being liable for someone tripping over their own shit trying to leave his property and 2) so you don't f up the property value around the area looking like you are having a perpetual yard sale.
That's what I thought at first - that if two bikes were stored unobtrusively on the porch, there wouldn't be a problem, but there's that pesky "or" in front of "in any way that may become unsightly or a danger"
=>meaning the 2nd bit is an addition to the first bit, not a modifier or qualifier. Basically "no storing these items in these places, and no putting them anywhere else "unsightly" or dangerous."
Ideally they'll say yes to the bikes on the porch; if not, we'll have to move things around and put a plastic mat down or something...not a ton of space, so kinda awkward.