Could you help me? 💋Kiss for you! (Patreon)

After members cancel their subscription, their membership level will display as 'Free'. Patreon replied to me, but there's a part I just can't wrap my head around. What does this mean?

Letter i wrote:

Regarding the membership levels, there seems to be a bug. For instance: a member subscribed to my 'Tier 2' level on the 1st of this month, but then unsubscribed on the 3rd. At this point, Patreon downgrades their membership level to 'Free'. However, according to normal logic, this member's level should remain 'Tier 2' until the end of the month, and only after the 30th should it downgrade to 'Free', as they have already paid for one month's subscription.

Reply to Patreon:

I hear your concern about some members appearing as 'Free' before the end of the month. When a member cancels their membership, they still retain their access until the end of their billing period. However, if they unsubscribe and then resubscribe on a free tier before their original access has ended, their membership level changes immediately.

It's just this sentence, I can't seem to grasp its meaning, I feel so silly!😭

Could you help me? Kiss for you!⬇️💋