I'm not a hundred percent for sure, but it could be the case that English might not be the first language of the people who put that web page together about 13 or 14 years ago.
As for the HB3s, they "threw them in" to the paper catalog printed around the same time. The grouping's not weird if you consider these were the only halogen headlight bulbs Harison Toshiba made: HIR1, HIR2, HB3 "white", and HB4 "white". All used the same machinery and the same parts, just with different coatings on the glass. They had some success with the HIRs (Nissan, Toyota, and GM bought them, for example) but limited or no success with the "white" HB3 and HB4.
Keep on chasing the unicorn, though; maybe eventually you'll find it!