I just purchased 3 more Model Packs

but when checking my purchase page nearly EVERY Model Pack shows this (even old ones like MP 5&6

):
(File Updated: 23rd Mar 2010)
Is this just because of the "change of order system" mentioned there or is there something new with all these packs and I'd miss necessary updates if I dont download them all again?
Because I would rather not reinstall everyting since I grouped/moved a lot of folders and have dozens of texture changes done on some packs - the weapon packs p.e. have mostly alternate hand skins as now standard ones and I'd not risk overwriting them.
Any advice?
PS: The complicated thread title is for the search function since I'll be probably not the only one asking this
In case you find my grammar and spelling weird ---> native German speaker ^^