It is a bug. Working on it now to minimize confusion. This is a relic of qcodefag's authorship. Basically, it pulls answers by post id… which aren't necessarily unique, whereas timestamps so far have been unique.
Note: I am the qanon.pub maintainer.
Yes, primarily because the site gets tremendous traffic.
I could move the deps to the site itself, but that doesn't seem important since it will be routed through cloudflare again, anyway.
What archive method are you using?