SSRS Reports fields error

I am creating a SSRS report and my output shows a fields which read the respective data for that fie开发者_C百科ld AND data from another field. the first 15 rows for the 2columns are ok and the rest have that problem, the first fields for the first column remain blank and the respective data is populated to the other column.

I would suspect that if you when into the layout section of the report in SSRS designer and navigated to the Value dropdown, you might have something like this in there for those problematic columns?

=(Fields![col1].Value) & (Fields![col2].Value)