The mint can set any amount it wants i guess to redeem. This is just another way they can scam ya.

I wouldn't rush to blame the mint without more info. Sounds like a lightning wallet setup issue.

Don't use eNuts it isn't maintained. Use cashu.me or @Minibits . Sounds like you are trying to open a channel with the token. Cashu doesn't take fees to redeem. There are fees to send a lightning transaction however.