Ok.. so you now have the connection between the Whitup's and Remblents and you know that Anne was with her grandparents by 1841, with Robert (her father) listed as not deceased in 1848, my guess would be that her mother Emily may have died earlier and that is why Anne and her brother John are with relatives. It's a mystery as to where Robert is in the 1841, but given the variations in spelling, he is probably out there somewhere, we just haven't been able to find him yet. So that is the first part hopefully solved for you

I had wondered about Phoebe Gates and looked to see whether her and Patience (Walpole) were perhaps sisters. Nothing to go on yet. I have found Phoebe Gates. da. of John Gates & Elizabeth Wall. . 8 November 1784. All Saints, Norwich, Norfolk in FreeReg with a possible
elder younger brother John b. 1793, but no Patience, so maybe not. The Walpole connection may not be there ofcourse, that may be a red herring too, they may just have happened to be lodging together as there is a 70 year old Samuel Morse in the same household with them all in 1841, we know he is not Phoebe's father, but he may be Patience's, or he may just be a lodger..
More food for thought....