For the bold font can you add this code to the custom css options:
.spb_content_element strong{
font-family:'Georgia'!important;
}
Regarding the masonry post titles being larger try the code below.
.masonry-items .blog-item .details-wrap {
padding: 28px 10px 30px!important;
}
Will forward now to the development because of the comments issue.
-Rui