Add the renewal fee to the FAQ or somewhere on the website so people know they will need 0.1 HNS to renew each TLD they own.
Duplicated domains: Cyrillic names are case sensitive.
You can end up with duplicated domains with Cyrillic characters. Example: "Пол" xn--r0a0di "пол" xn--k1afc These are going to be two separate TLDs with the same name. Johnny suggested filtering to make duplicated names not searchable as a way to resolve this issue.