Why do deleted photos cone back on other devices.

I mostly use LR on my ipad, but occasionally on my MacBook Pro as well.  

When i delete my images on the iPad they go to recently deleted. All good, 

When i then go to my MacBook, and AFTER both devices say they are up to date and syncing has stopped, i see all the deleted images on the MacBook. 

I understand that if the MacBook hasnt been opened since i did work on the ipad it will be showing an older verison of my Libary, but why is it not deleting the images during its sync?

I thought both devices were suposed to show the same thing?

Im using the current (as of today) verisons of LR/Mac OS and iPad OS, so please don’t suges it update anything. There's nothin got update.