If he brought all the house of wolves there would have been much more than what we fought. He sent them back other wise how would the house of wolves pulled off half the shot they did without prior knowledge

He didn't bring all of them, likely just enough to put the House in a position of power over the other houses should his plan have succeeded. If he did send some back he likely would have warned himself of Varik's betrayal and avoided the downfall of his house and the failed siege of The City. Or this could all be a moot point if Destiny opterates under the assumption changes in the past don't affect the present we know, it just forks into another timeline parallel to it with a different outcome, but thats unlikely seeing the events relating to Kabr's lost fireteam.

funny enough i had a theory that kabr's fireteam doesn't even exist in our time line at least not yet

They no longer exist, atleast in our timeline. They were there, even Kabr remembered them somewhat, however their existence (past, present, and future) was erased by the oracles.

But time does and does not exist in the vault of glass

The Oracles have the ability to change the past/present/future of anything that enters the vault.

Because time does and does not exsist