Bill Cycle isn't changing

On my membership levels page, PMP always shows “per Year” as the length of the billing cycle, even if I change it to X months, days or years. My levels are set as 1 year, 5 years, 10 years and lifetime.

http://www.speakklingon.info/membership-account/membership-levels/

Shouldn’t it show the correct billing cycle like “per 5 Years”, “per 10 Years”? For a membership that never expires and has no reoccurring payments, shouldn’t it just list the price and not say “per Year”?

The page in question is no being cached, nor have I done any customization to the page templates.

Thanks.

https://ww.wp.xz.cn/plugins/paid-memberships-pro/