Hi,
Thanks for your feedback.
Since the release of HikaShop 2.5.0 ; we made several "hot fixes" and generate new packages (which have different build number).
We can't email everybody for that but that's right that we could see to improve the update system in order to also check the build number and not only the release number.
I created a feature request for that.
Regards,
Jerome - Obsidev.com
HikaMarket & HikaSerial developer / HikaShop core dev team.
Also helping the HikaShop support team when having some time or couldn't sleep.
By the way, do not send me private message, use the "contact us" form instead.