I need to get a pretty updated (it can have a couple of months of not being updated) dataset of all bitcoin addresses that have received funds for a university data science project.
I wanted to say my data is updated weekly, but one of the weekly updates was last completed on March 25. I'll look into this, and expect the new update to be ready within a day.
Which is the one you'd suggest using? I think that it's better to have them ordered alphabetically than chronologically.
It depends on what you're looking for. Chronological holds more information, alphabetical is probably more practical to work with. Note that the exact sorting may not be what you expect: the way numbers or capitals are sorted seems to depend on localisation.
Is the one posted as sorted in your website complete?
Yes. Anything newer you can add yourself from "daily updates".
I am more than open to provide a contributing donation to your website for the help you've given us
Thanks. There's a donation address on my site, in my profile, or on
my other site 
Update: I found the culprit: I made a mistake when I wanted to speed things up. It's fixed now.