I clicked "multi-quote" on four of the quotes and then when I'm ready to make my post, I clicked on the "reply" button on the bottom left side of the last post and that sends me to the advanced posting. That worked.
So here's the thing, if I just posted these quotes without having a response from myself, it's not going to work, so I typed "test test test" and the post went through.
So far I'm not able to recreate this issue on Chrome on my computer.
I'm going to make another test on IE 11.
EDIT: it worked on IE as well.
I just came from the PWT. Quote isn't working for me. Popped into this thread, obviously it works here. I jumped back into the PWT thread to check again, still not working.
But, if I select Multiquote on the first one, then I can't quote either. Deselect multiquote, and I can again quote the second one. Whatever is happening, it is post specific. We had this problem about a year ago and it went away. At the time, I thought it had something to do with emoticons or images. It seems that the posts that can't be quoted most often have one of the two or both.