OK, I didn't want to get into this, but that's pretty much exactly what happened. Or to be precise, what happened and is going to happen. Some graduate student wahoos in the Temporal Intervention Studies Lab at USC (Fall 2076 semester) came up with the idea to go back to the Library of Alexandria before its destruction, and cart off as much as possible in the dead of night - considering that it was all going to be lost anyway.
Long story short, they nailed the chronal procession : spatial coordinate calculations spot-on (no mean feat). But they neglected to compensate for abnormally high chronolocal sunspot activity, which caused their insertion bubble to destabilize by 0.0067 GigaBrowns. The resultant ambient heat flare ignited most of the library.
As usual, history ended up weaving its own tale to explain the otherwise inexplicable.
Luckily, the destabilization wave impacted back upon our intrepid chronoarchaeologers, preventing them from materializing in the middle of the inferno. They suffered nothing worse than migraines, nausea and nosebleeds.
Which they would have had anyway. Standard side-effect for that model chronopult.