ModelBuilder parameters not changing when running in batch?

I have a simple model that selects layer by attribute of the feature class with the parameters of start year and end year set up as doubles and then use an expression in the select layer by attribute as: datesample_1 >= %Start Year% AND datesample_1 <= %End Year%. It then uses copy feature to make an output feature class. When I run the model individually it works fine, but when I run it as a batch even though I'm giving it different parameters, when it runs it uses the first parameters I entered over and over so my output features are all the same.