How High to Bid

Playing IMPS, Vul vs Not, you pick up 97 63 JT842 A763 and Pass in first seat. It goes Pass on your left, and Partner opens 2C, semi-std. This goes 2D on your right (alerted as showing the majors), so you pass, showing some values and no clear bid, and it goes 2H on your left. Partner now bids 3H, P to you. 4D seems about right on the hand, and partner now bids 4S. Hoping the opps know what they are doing, you bid 5C, and now LHO comes in with 5H. This goes P, P so you double. It finally goes P, 6D by partner, P back to you.

N   E   S   W
-    -     P    P
2C 2D P   2H
3H P   4D P
4S  P   5C 5H
P    P   DBL P
6D P    ?

Do you bid again on this hand?

Not sure what the right bid is, with the probable wierd distribution walking around the table. Partners hand is AK8  A  AK653  KQ82. It looks like a pretty good grand until Clubs go 4-1 with the unavoidable loser. No squeeze works. We played in 6D when the S hand passed the 6D bid, but it is a very tough hand to bid.

And I have no idea why E-W did not bid more Hearts early and jam the auction. Seeing the hand after, would have expected that.