So, I did a bit more testing on this and it works as I have said. If I create a poly, cut into two, delete the two, I see the original one, then need to delete a second time. It should just delete once. If I create a poly, then reshape the poly, then try and delete the reshaped poly, I see the original shape before the reshape then need to delete a second time. Another process that when needed to be deleted, should happen during the first delete operation rather than having to do two deletes. One thing though for updates, the browser I am using (Chrome and Firefox) does not seem to refresh updates, or deletes quickly.
Love though that when I add, I can add, then close browser, then reopen browser, then reselect update and then delete. SLB does not allow this to happen (Not to compare).