Yeah don't know who to believe.
Previously Aberdeen have been desperately trying to shift shirts at the end of the season, so have obviously over estimated what they would sell. These are "record sales" now though and certainly I've never known us to sell out in just a few hours (I actually went on the club shop site this morning just to see if there were any more photos of the strip and was put in a 20-minute queue).
We're not considered an "Elite" club by Adidas (odd, considering we're the only club on their roster who are Scottish Cup holders) so getting a restock appears to take time. If you remember the 'spezial' thing they did, the stock appeared to be really low and has never been restocked.
Likewise, I wouldn't put it past us to make headlines with "record sales" and "strip sold out in hours" thing. But why make someone wait a month for a shirt they want now - in a month they might have changed their mind (or found other means).
For comparison, Man Utd (who are an Adidas elite club) you can buy both strips in all sizes on their site, and likewise Celtic (elite from this season, which is odd because... I already used the Scottish Cup joke didn't I?) all three strips on their site are available in all sizes.