one more question: Are you creating a new hover effect from the ‘add new’ tab or are you adding additional effects all within the same post? Meaning, you can keep clicking ‘add more hover info’ under each creation which adds another another option to set up additional images and effects all with that same ‘post’ in a sense. When I create individual hover effects by clicking ‘add new’ on the left of the WP dashboard I am not having this
‘1 per row and left aligned’ issue. If that doesn’t fix it for you there must be some positioning and display settings that are overriding what you are doing.