How does my current balance keep going up each month even though I pay the statement balance on time every month?

Hi all! So I pay my full statement balance usually 3-4 days before it’s due every month. The payment is accepted and I haven’t incurred any fees or interest. However, my current balance has been going up every month, despite my on-time payments of the full statement balance, not the “minimum payment.” As of now, it’s $700 more than my statement balance. Why is this happening? I assumed that if I paid my statement balance on time every month, I should be paying off all of the charges from that month. Am I missing something?

My card closes on the 19th and I usually pay on the 11th (due on the 16th). I understand the current balance may fluctuate as I continue to use the card before the next statement balance is due. However, my current balance is still increasing every month even with my statement balance payments. Can someone please explain this to me? Thank you in advance!