Preflop I think your play is fine enough, at least you put in a proper raise. Personally I would have gone 7/8bb with 3 limpers before me but hey 6bb is ok just a personal thing to really try and make sure the best I can that I isolate against 1 opponent.
The 2 limps in early then calls, youve gota be putting definitely 1 of them on a medium pocket pair. Sounds fine for me to say now seeing they had 77 and 88! but I promise you thats what I would have said anyway. Its what I always say when I see a limp UTG or UTG+1 call a raise, 'I bet hes got a pocket pair' is what I say. Yep.
So the flop is a wee bit scary being a bit conjoined BUT no A and no K so thats the main worry taken care of. Bout $10 in the pot and it goes CHECK / ALL IN FOR $14. You HAVE to at least call that no doubt about it. He could so easily have top pair J, flush draw, pair and a gutshot, lots of things you are ahead of % wise. Anyone who says thats a fold I really disagree with.
SO, should we call the $14 or reraise is the question basically. I think in hindsight a straight call would have done the trick, the UTG check would be having to call $14 into a pot of $38 if he was on a draw and those odds are nothing to shout on about for him so I guess theres no real need to reraise in terms of making him pay to draw.
I totally can see why you minreraise though and I might have even done it myself in the heat of battle just to really try and isolate that all in who I believe im ahead of % wise. Who knows maybe it is the right play, its a close one between that and calling anyway.
When UTG checkraises all in, id be like oh ffs hes flopped something really good. At least 2 pair and as I though pocket pair could well be a set, theres a possible straight on too with the 98. Still with $92 in the pot and only $16 to call thatd be a pretty disciplined laydown (though probably correct horribly). Id hate to fold and see some random donk flush check raise all in or something though so id call just incase I reckon
The pluspoint to just calling the all in would have been when the UTG reraised all in, you could have safely folded as it would have been WAY more expensive to call it (around $30). Thing is though I really wouldnt be expecting the UTG to do that so its not really something you can factor in, in the 20 or 30 seconds you get to act.
I really think a very large proportion of the time UTG has nothing and folds and youre left heads up as a favourite (in this circumstance around an 80% fave against the 88 off the top of my head).