If you are using the LIKE keyword to check for VIP and VIP Plus then VIP would return both. If the column containing the membership type can only equal VIP or VIP Plus then use
<?php if ($row_WADAtbl_directorylistings['membership_type'] == "VIP") {
code to run
}?>
or
<?php if ($row_WADAtbl_directorylistings['membership_type'] == "VIP Plus") {
code to run
}?>
You could also modify this with an IF ELSE if there are only 2 possible membership types