You'll need to verify that you have your filter set up correctly. If you have the #2 filter working correctly using the #1 value, the #3 should work in a nearly identical way. I'd review to make sure it was added correctly.
The other thing you will want to consider is the fact that #3 will probably need to filter against the values for both #1 and #2. If you only filter against the #2 value, you might be unexpected results depending on your data set.