A formula within a formula is not working

[ebernstein12]

I have two formulas in a workbook

1.  =IF(ISNUMBER(SEARCH($U$3,$M4)),"1","0")

This returns either a 1 or a 0

2. =IFERROR(SUMIF(dates,$A3,demo),"")

Results of both formulas are formatted as numbers

If I copy paste special the results of the first formula, then the second works.

Why won't the second formula work with the first formula in the cell? 

Thank you

[#2]

I figured it out- It works when I remove the "" from the first formula.