anyone have any suggestions? :(

there is some space around the screens,
It sounds as if they were not made to fit the windows properly.

Is it too late to have the sellers check into the screens being properly made to fit the windows properly?

and i think the ones we have were made for people who don't open their windows.
About all screens in my opinion will let in a number of night bugs, particularly if there is a light on inside the room as they are drawn to the light. I have never heard of having screens made for people who don't open their windows...why have any screens on them then?

Possibly rope caulk would work if the space is not too wide. The link below shows a good pic of it. It is flexible, and removable, and available at about any hardware store.

Here is a link that might be useful: Pic of rope caulk