leaking when recharging a\c

when i’m rechargeing the a\c refrigerant leaks out of the hose (the end where it’s attatched to the a\c) why isn’t it an airtight seal?? should it be like this?? my kit is from autorefrigerants. thanks…

change the hose or tighten the hose with clamps

its leaking out of the fitting attatchements… not the hose… thanks…