Why does Konoha have only 1 tailed beast? While others have 2 considering 1st hokage distributed it to other villages.

It doesn't make sense to give other villages to have advantage of having more power. I haven't read manga so have no clue if it's been addressed somewhere.
Their power levels are not equal. Nine-tails power level is equal to every other tailed beast combined. It is stated in no plainer words. However, a beast's power is not determined by the number of tails it has, e.g. two- through eight-tails have a comparable power level.

Check this out for more info.