Uncle Alphard - why off the Tapestry?

[Hagrid]

No: HPFGUIDX 155181

Too many times characters give opinions that distract readers form the 
real thing. (Lupin's Bogart; trio hunting Snape in PS/SS; Black 
hunting Harry in POA; etc). So, I notice this was worded as an opinion.

(OOTP Chap 6)  Sirius: "... and when I was 
seventeen I got a place of my own. My Uncle 
Alphard had left me a decent bit of gold - he's 
been wiped off here, too, that's probably why"

FACTS:
- Uncle Alphard was in Hogwarts at the same time as Tom Riddle (Tom 
born 1926. Alphard born after 1925 when Sirius' mother was born)

- Sirius lived at the Potter's house after he turned 16. Alphard would 
have still been on the tapestry until then.

- Alphard's niece, Bellatrix, joined the DE and is older than Sirius

What else could it be? Your turn -

~ aussie