I have had this happen to me before.
You are talking about ancestry image #7 Pennsylvania > Philadelphia > Philadelphia > District 415
Where it says image 7 change that to 26
On image #26 which in this case is also page 26, you will find some additions that the census taker made to previously enumerated households.
On that page the census taker adds the Pollacks to dwelling # 56 which was enumerated on page # 7.
Hard to explain - just look on page 26.
Census takers sometimes make corrections and additions on the last page of the district.