Folding to River Bet Too Much? Limit

[MyTurn2Raise]

Hey all, for anyone who's noticed, I've picked this game up over the last month and a half or so. so far, it's ok. Positive 1.06BB/100 hands after 26k hands. I'm not exactly pleased with this. Investigating my hands, I see that I fold an abnormally large amount of the time to a river bet--near 38%. This is about double the average of players in my database. Without posting a thousand hand histories, is this a sign of throwing away too many potential winners or chasing on flops that miss me?

BTW-My showdown win percentage is 63.89% (pretty average, which I'm disappointed in). VPIP 19.37%. W$WSF 30.84%. WTSD 37.98%.

[MyTurn2Raise]

Oh yeah....this is from .5/1 to 5/10 on party skins and ultimate bet

[Notorious G.O.B.]

Fold less, sir. Around 50% is good for a win at showdown percentage.

[Ribbo]

It's a sign that your starting hand selection is not good enough. If you played better cards to start with, you would have something to call the river bets with.

[Notorious G.O.B.]

Actually I didn't notice this was for Omaha. I don't specifically know, but I bet it's about the same.

[GooperMC]

I only have data from .5/1 to 2/4 with the majority of it coming at .5/1 but looking at my database your WtSD is actually high.

It could be a difference in levels (.5/1 plays very differently from 5/10) but I have WtSD 30ish and W$SD 61.

Maybe you should post the distribution of your what levels you played you hands along with your other stats like aggression, PRF, ...

[MyTurn2Raise]

Lvl |Hands |VPIP |W$WSF |bb/100 |WTSD |W$SD |PFR |Scoop%
'3/6 |6620 |19.74 |32.65 |(1.03)| |37.51 |64.65 |3.81 |5.03
'2/4 |9271 |18.75 |30.61 ||0.75|| |37.13 |61.64 |3.20 |4.96
'1/2 |1737 |18.94 |31.99 ||4.11|| |37.92 |70.39 |2.88 |4.09
.5/1 |8195 |19.73 |30.10 ||2.47|| |39.47 |63.57|1.84 |4.41
LVL FlopAgg TurnAgg RiverAgg TotalAgg
'3/6 1.23----1.29----1.14-----1.23
'2/4 1.10----1.19----1.19-----1.15
'1/2 0.88----1.40----1.19-----1.11
.5/1 0.90----0.97----0.90-----0.92

[MyTurn2Raise]

I feel naked in front of everyone.

I'm completely re-evaluating my game though, so thanks for this uber-valuable feedback.
Besides folding to river bets so much, which I don't quite understand (Hence, the post). I am:

1. Moving up limits too fast. I clearly do not possess the skills to beat the 3/6 yet and my 2/4 performance is nothing to brag about.

2. Not showing down winners at the river enough. Nearly all the best players in my database are 67% and up.

3. Not utilizing the proper amount of aggression. I've noticed the best players seem to have a rising aggression with river > turn > flop > pre-flop.

I understand these things and have plans. The folding to river bets, however, is consistently between 37% and 39% for all levels. I do not understand that.

I have this fear that I'm not reading the board as well as I think.