Oil filters

[Kneale Brownson]

I've replaced a lot of oil filters in the nearly 20 years I've been driving Audis.  Never had a problem getting a new one to seal.  Today I'm changing the Avant filter and I start the engine to check for leaks.  I have a flood.  Filter was hand tight before I started the engine.  Now it'll turn a bunch more.  OK, refill, restart and I've got a gurgle and more flood.  The rubber gasket is still on the old filter.
   
  But, I realize the filter diameter is significantly different.  I'd gotten several filters for V8s and for 200q20vs from a dealer source.  The ones for the 200s have a part number  068115561B.  The one I took off has no part number but says OC47 on it.  Both are Mahle, I think.  ETKA says use 034115561A.  Looking at one of the larger ones, I see it says "for 1983 and earlier models".  Did I get snookered?  The rubber gasket sizes are identical on the larger ones and the 0C47 one.  Do I just need to snug it down more than hand tight?  I hate to use a wrench (strap type) on it and then have trouble getting it off later.  
   
  BTW, I did oil the gasket and fill the filter before installation.