When Susan slips in the raft when she first starts rowing, one of the oars slides all the way into the water. In the next shot, both oars are perfectly placed in a rowing position in the raft, meanwhile Susan has not even raised herself up from the bottom of the raft. Nobody would have been positioned to move the oars in such a short period of time.
(at around 1 min) Desi Arnaz comes home from work and pauses by a table and lamp to clandestinely listen to his wife and a couple invited to dinner before announcing that he is home. A few minutes later, a front shot of Desi reveals an open, wrought iron partition with a clear view of the front door and table that he was standing by, indicating his presence would have been evident from the moment he entered the house.
Upon looking at the campsite the first morning, there is considerably more material there than could ever possibly be carried in the station wagon in one trip.
The day after the Guardian Angel first appears, Susan divulges to the psychiatrist that she has seen what she thinks is a guardian angel. But at this point the angel did not tell her who he was; in fact, he had not even spoken. And she had not mentioned a guardian angel to Lorenzo when she discussed her fear the night before. The story doesn't explain why she came to believe that what she saw was a guardian angel.