I recently moved a cigar from a humidor to the previous smokes list on the android app and the cigar disappeared from all lists.
I've seen similar glitches every once in a while.
I have seen similar issues when using my iPhone or iPad. When you hit move, they are actually going to your previous smoke list. I find it best to use the computer or desktop site on the iPad. Go back to your previous smoke list and move it back to where you were trying to go.
I continually have sync problems. My iPad says I have 111 cigars in my humidor. The websites says I have 113. The iPad is correct. In this case two cigars won't move from the humidor to the previous smoked list. I've tried both partial and full syncs...multiple time. No change.