I don't seem to get that issue anymore with it only charging at a faster rate if it was turned off first - ever since I swapped to the cable it shipped with.
In other news, I've received my hub from China...
It's connected to my Linx now, pulling over 1A from the charger (whilst being on 85% battery too - I imagine if the battery was lower it'd pull even more) and connecting to my USB devices. This is on the mode 2 setting.
So even if 1A IS it's limit, that's still twice as much compared to my other OTG hub - so hopefully enough to play and charge at the same time!
That's good, finally one that works
Hope to recieve mine soon, looks like the same sort thing so fingers crossed.