I haven't had any issue with the bundle myself, besides maybe download speeds, do remember you can only download things via the 'download' button on the bundle list, for whatever reason, if you open the game info page, it doesn't show as 'owned', which is a very weird... decision for the website, and admitedly confusing.
What I mean is, games won't even appear on the 'library' proper just on the 'bundle' section, until you check the download pages of each one, that I can get, not spamming the library, but... not showing them as owned if you check the page, and be forced to open library/bundle/etc each time to double check? that is kinda odd.
Third edit, I heard the website might be having traffic issues as well, due to volume of people, keep tht in mind. but I for sure checked more than 5 games without a trouble