Advice on to keep cubing or not

As a 17x hero you really dont need Decent HB unless you plan on soloing bosses a lot. It likely is a glitch, but if the bonus %str is worth it to you, then go for that, personally i'd keep the pants since skill items are pretty rare, it hasn't been fixed in KMS yet to my knowledge, so we're not really in danger of the bug being fixed, at least not untill you are 200 probably.