Quick update: I may have found a CSS workaround for the second item:
.wpsp-overlay .wp-show-posts-image, .wpsp-overlay .wp-show-posts-image img {
z-index: -1 !important;
}
.wp-show-posts-inner {
z-index: 50 !important;
}That appears to address the issue. Still can’t quite get a solution to the first item.