What is the time you use to calculate the numbers ?
I am trying to reconcile your count against
https://blockchair.com/bitcoin-cash/charts/transaction-count
which may be UTC (?)
That explains the differences in the numbers - that page updates constantly. The numbers you see there rely upon whatever time you view it. The other one has .tsv data by UTC days.
You can probably outdo my crudimentary spreadsheet: https://noise.app/Sanctuarian/p2gnxgjk The 15day-ma numbers trend up now. The .tsv data is stable except the final day.
After my computer being repaired, I'll try to write a script to generate such statistics by subtract blockchains transaction at https://blockchair.com/compare day by day.