1. You can see it ingame, but on the website you can only guess what the secondary mode is. For high grade 2h swords it is polearm mode, and so on. Either way, seconday mod is useless in the most cases (except 1h which become 2h in secondary mode).
I would recommend Heavy Bastard Sword, because it's fast, has a good damage and reach, and also 2h stab is cool.
It can be used with shield, as 2h, and as polearm. In any case you need apropriate wpf (1h. 2h, polearm), so if your build has wpf only in 2h, there's no sense in using secondary mode or shield with this sword.
About glancing - it totally depends on your footwork, damage of your weapon and type of damage. 1h glanses more just because it has lower damage in average. Weapons with blunt or pierce damage almost never glance at all.