When a user enters text in description area, The script checks maximum length at block below.
rlCommon.class.php
Code:
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As you see, It checks text area length limit after using strip_tags function(which removes all HTML tags)
Also based on CKEditor config, it counts characters except than HTML tags. OK, so far no problem.
Now, when the script wants to save text area at block below.
rlListings.class.php
Code:
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It uses substr to truncate original text (contain HTML tags), based on limit defined for text area length.
Obviously, it causes loosing some data from the end of text area, especially if you use nearly all length limit and also use some HTML tags.