This is a long post - sorry. I am puzzled by this information and your family. You will need to read and check it.
If you don’t have the Roach/Curley marriage it might be useful to purchase it.
1881 4065/92/29
John and Catherine Curley, living in a Court, Brunswick Street, Oldham with children and boarders, Richard and Catherine Roach.
1891 3300/7
John and Catherine Curley with several children at 7, Smethurst Street, Oldham with Thomas Curley, widower
1892
Thomas Curley, 61 yrs burial - Greenacres Cemetery
In the same burial plot
1886 - Bridget Curley, 56 yrs, 5, Hanover Street
1893 - Elizabeth Curley, 6 yrs, North Street **
1894 - Sarah Ann Curley, 4 yrs, North Street **
1894 - Margaret E Newell, 8 weeks, 3 Daisy Street
1895 - John Curley, 3 yrs, 10 Hanover Street
** Lancs opc - baptisms - parents John and Ellen Curley need Newall
I can’t see this couple in 1891 but they are in 1881 and 1901
**in 1901, he is born Galway
Marriage
1874 John Curley and Ellen Newel
There is also a marriage:
1878 Margaret Newall and Thomas Curley
I can’t see then in 1881 but
1891 3300/63 - New Radcliffe Street
Thomas and Margaret Curley. Thomas shows birth as Chesterfield, Derbyshire
This looks to be the family you found in Derbyshire and the burial records seem to fit.
I find it confusing because the burial record for Thomas Curley shows Smethurst Street as is T C in 1891 with your family.