Minecraft – Testfor trigger isn’t working as expected in command blocks

So I have made a trigger objective:

scoreboard objectives add Test trigger

I have setup 3 command blocks with this in each one of them:

Command Block A – testfor @a[score_Test_min=1]

Command Block B – testfor @a[score_Test_min=2]

Command Block C – testfor @a[score_Test_min=3]

and each and every one of them has a comparator to test output.

And yes I have scoreboard players enable @a Test in repeat.

Now the problem is that it's not working as expected of _min.

(I'm going to say light up a lot meaning the comparator will activate)

When I run the command trigger Test set 1 it lights up the comparator for Command Block A but when I run trigger Test set 2, it keeps A light up, and then lights up B. I would expect A to not light up since I have a _min. This goes to same when I set the trigger to 3, then lights up all of them.

Now supposedly someone will say that just add score_Test_max but I did for all of them and what just happened is that, it doesn't light up at all. So it would be like this:

testfor @a[score_Test_min=1,score_Test_max=1]

and when I set the objective to 1, it doesn't light up the comparator.

So is this just a bug? Am I doing something wrong? Please help me.