I purchased a new filter

Question

I purchased a new filter (Model LT600) Part #(5231JA2006B) for my LG refrigerator I installed the new filter and I am unable to set the filter/month button. After installing the new filter the number (1) appears. Is this normal and does the number raise as each month passes by? Or is there a higher number starting and decreasing as each month passes by and eventually goes to (0).