Here I'll post 2 hand histories with results (in white), sorry if it affects your thought process. Is this so common? It makes playing much more difficult and the reads come so much into play.
As always all comments are appreciated!

To be more specific with questions:
How is my line?
What are other possible lines here?

And after you think about possible lines and look at the results.
Is this more common at higher levels?
How do you handle this?

Hand1. I had a bit of read during the hand, but it was tough. (OP played less than a round.)

Seat 3: Sungu Malatu ($252.45 in chips)
Seat 5: Hero ($435.20 in chips)
Seat 7: yousfi ($44.45 in chips)
Seat 9: cell6996 ($130.40 in chips)
Seat 10: jimbean2007 ($92.05 in chips)
ANTES/BLINDS
kawej1 posts blind ($2), yousfi posts blind ($4).

PRE-FLOP
cell6996 folds, jimbean2007 calls $4, Sungu Malatu calls $4, Hero bets $22, yousfi folds, jimbean2007 folds, Sungu Malatu calls $20.

FLOP
Hero bets $44, Sungu Malatu calls $44.

TURN
kawej1 checks, Sungu Malatu bets $50, Hero calls $50.

RIVER
kawej1 checks, Sungu Malatu bets $134.45 and is all-in, Hero calls $134.45.

SHOWDOWN
Sungu Malatu shows [ QH,KS ]
Hero shows [ 9H,9S ]
Hero wins $509.90.

Hand2. OP is 49/4/2 after 200 hands. I thought that he had an overpair here and he wouldn't fold even 77 or 88 here.

Seat 1: poker16888 ($304.00 in chips)
Seat 2: .Terrorteddy ($312.70 in chips)
Seat 4: sanne12 ($552.50 in chips)
Seat 5: Santakill ($152.40 in chips)
Seat 10: Hero ($684.00 in chips)
ANTES/BLINDS
sanne12 posts blind ($2), Santakill posts blind ($4).

PRE-FLOP
Hero bets $14, poker16888 folds, .Terrorteddy calls $14, sanne12 folds, Santakill calls $10.

FLOP
Santakill checks, Hero bets $33, .Terrorteddy bets $66, Santakill folds, kawej1 calls $33.

TURN
Hero checks, .Terrorteddy bets $50, kawej1 calls $50.

RIVER
Hero checks, .Terrorteddy checks.

SHOWDOWN

Hero shows [ 5H,3H ]
.Terrorteddy shows [ 10S,AC ]
.Terrorteddy wins $273.

No, its not that common. These 2 are just fools. If you start playing 99 like that too much, you'll get raped because you are beat there most of the time.