Hi Pharan,
Thanks for your quick response. Here's my texture settings.

Though I usually play with this, I sometimes uncheck the "Square" box. And I haven't tried to change Atlas extension to atlas.txt in the setting box, I normally do it manually when I already have the .atlas file.
For the atlas file, take note that I removed "image/" on the parts recently. And here's what's inside.
minotaur.png
size: 2610,2610
format: RGBA8888
filter: Linear,Linear
repeat: -1ankle_back_left
rotate: true
xy: 2534, 2389
size: 52, 62
orig: 52, 62
offset: 0, 0
index: -1ankle_back_right
rotate: true
xy: 2536, 2443
size: 54, 62
orig: 54, 62
offset: 0, 0
index: -1ankle_front_left
rotate: true
xy: 2536, 2499
size: 53, 63
orig: 53, 63
offset: 0, 0
index: -1
ankle_front_right
rotate: true
xy: 2536, 2554
size: 54, 63
orig: 54, 63
offset: 0, 0
index: -1
body
rotate: false
xy: 2, 1412
size: 1487, 1196
orig: 1487, 1196
offset: 0, 0
index: -1
hand_left
rotate: false
xy: 1879, 20
size: 391, 357
orig: 391, 357
offset: 0, 0
index: -1
hand_right
rotate: false
xy: 1485, 2
size: 392, 357
orig: 392, 357
offset: 0, 0
index: -1
head_attack
rotate: false
xy: 922, 792
size: 1462, 618
orig: 1462, 618
offset: 0, 0
index: -1
head_normal
rotate: true
xy: 2, 13
size: 1397, 918
orig: 1397, 918
offset: 0, 0
index: -1
hip
rotate: true
xy: 2291, 1486
size: 521, 296
orig: 521, 296
offset: 0, 0
index: -1
hoof_left
rotate: false
xy: 2386, 1385
size: 115, 99
orig: 115, 99
offset: 0, 0
index: -1
hoof_right
rotate: true
xy: 2503, 1369
size: 115, 99
orig: 115, 99
offset: 0, 0
index: -1jaw_attack
rotate: false
xy: 922, 257
size: 496, 533
orig: 496, 533
offset: 0, 0
index: -1
jaw_normal
rotate: true
xy: 2291, 2009
size: 335, 311
orig: 335, 311
offset: 0, 0
index: -1leg_left
rotate: true
xy: 2386, 2472
size: 136, 148
orig: 136, 148
offset: 0, 0
index: -1
leg_right
rotate: true
xy: 2386, 2346
size: 124, 146
orig: 124, 146
offset: 0, 0
index: -1lower_arm_left
rotate: true
xy: 1491, 1457
size: 573, 798
orig: 573, 798
offset: 0, 0
index: -1lower_arm_right
rotate: true
xy: 1491, 2032
size: 576, 798
orig: 576, 798
offset: 0, 0
index: -1
thigh_left
rotate: true
xy: 1201, 24
size: 231, 282
orig: 231, 282
offset: 0, 0
index: -1thigh_right
rotate: true
xy: 922, 20
size: 235, 277
orig: 235, 277
offset: 0, 0
index: -1upper_arm_left
rotate: true
xy: 1791, 379
size: 411, 369
orig: 411, 369
offset: 0, 0
index: -1
upper_arm_right
rotate: true
xy: 1420, 361
size: 429, 369
orig: 429, 369
offset: 0, 0
index: -1
Thanks!