Count Trigger for visited layers, stop base movement when hovered

I created a slide where the learner hovers over the data field and the information layer appears. But have run into 2 problems.

1.      I set the layer properties to not allow the learner to click on base slide. But they are able to move the mouse and the next layer stops before the time line ends. Is there a way to create a trigger to keep them from being able to do this? Would it make a difference if they had to click the field versus hover to get activate the layer?

2.      I have a counter that shows the learner how many of the 12 fields they have visited to assist in keeping count. The hover boxes will be transparent when the course is live, so there will be no 'visited' state being shown. The counter works as designed, but if they revisit a field it also adds to the counter. I tried to create a visit state on an object off the side of the screen, but all that did was make the counter not work at all.  Can someone tell me how I would add a trigger for it to know to not add to the counter if the layer has already been visited?

I have attached what I have working so far if that helps. Thanks you in advance for the assistance. I am slowly learning how to use triggers.