I've got some new for you, i tested your clients UA against my forum using your spider list and was able to gain access to my site so it's not this mod keeping him/her out.
You can check for yourself here
http://www.botsvsbrowsers.com/SimulateUserAgent.asp just enter his entire useragent in the test window and your site below, hit Go and enter the Captcha that pops in to the results window, hit Go again and you'll see your site
So from that this mods fine and not causing a problem.
EDIT: BTW do you know that every one of the bots you supplied in that list has a space before it? the mod will look for a space before each of those words if thats how it appears in you ban spider list.