Question on E300DT fuel filter bolt o-ring(s)

[deltajetfixer]

I just finished "Vitoning" all the o-rings under the hood except for the delivery valves.

The last ones I planned on doing were the two o-rings listed in the diagram as #'s 14 and 11http://www.detali.ru/cat/oem_mb2.asp?TP=1&F=210025&M=606%2E962&GA=722%2E608&CT=M&cat=19T&SID=07&SGR=120&SGN=04
The interesting thing is that there was only ONE o-ring installed and the bolt appears to have only ONE "groove" for a single o-ring.

I tried playing with the placement of the smaller o-ring along the bolt shoulder (#11) that came in my "Viton Kit" and it kept riding up to where it almost obscured the hole on the banjo bolt.

I installed just the single larger o-ring (#14) and everything is operating normally. The center rubber gasket on the filter seems to perform the job the second, smaller o-ring would...if there was a place for it on the bolt.

Anyone else run into this?