Chris,
No problem... make sure you question is someone says your "shifter is worn out", etc. etc. Most MKII's can have many many many miles on them without the shifters being "worn out" its an improved design, especially over the MK1 setup in which the ball at the bottom of the shifter does "wear out" and eventually crack, etc. resulting in more slop in the shifter... but there are easy to install rebuild kits for these items, etc. Generally what wears out is the linkage and the associated bushings on the transmission linkage itself, the "ball and sock" hemi joint linkages. They are plastic on the ends and the bushings are plastic as well and they ovalize over time and the linkage ends actually crack. Making things sloppy. Your situation sounds like it could use a nice rebuild (linkage rebuild kit may cost you $8 for the bushings, 5-10 for the linkage pieces, etc. 20.00 on a shifter rebuild kit, etc...) but really the issue of no 5 sounds like a major alignment issue in the linkage somewhere. Just my opinion. If the installer took your shifter loose at all, etc. its def. out of alignment and the MKII used a really slick alignment tool to get things back to spec....well worth the $12 investment to have for you and any buddies with MKII, it may even work with the MKIII as well...can't remember.
Here is a complete MKII shifter/linkage rebuild kit that includes the tool...

here is the link to where you can buy it... $110.00 takes care of everything and you get the tool as well. All OEM parts...
http://www.parts4vws.com/catalog/product_detail.asp?PartNumber=A2798211There are really nice kits out there to rebuild your linkage and put almost lifetime bushings in as well. The MissingLinkz kit that Roger Brown makes and sell comes to mind....AWESOME stuff... adjustable heim joins, teflon bushings, etc. Good stuff...more expensive, but worth the investment at close to 100.00 for a complete kit (linkage and bushings) . If I stay 020 for my trans selection, I'll be adding this to the bunch.
Here is a link to Roger's site, etc. for MissingLinkz upgrade... good stuff. Say hi from me if you end up buying one

Alot of good information on his site though regarding operation, improvements, and he has a bunch of options...
http://www.4crawler.com/Diesel/ForSale/ShiftLinkage.shtml#IntroductionHere is his 100.00 linkage upgrade kit...

Hope it helps...
Joe