One who always go LeKula is called a Rasha (Rosh Hashana 14b). Why?
Because a Kula in one place may be based on a situation that makes a Humra in another. In other words, you can’t play both sides of the fence, or else you will contradict yourself. See the above citation and Rashi ad loc for a better understanding.
It seems to me that if the items are unrelated, then you may be able to be lenient in both, BUT you have to make sure they are unrelated in their reasoning’s. CYLOR.