Is this a bug or it it in the game?

when im trying to upgrade my centrosaur 2 lvl 7 it costs 7000 dd and 340 serum
but when im trying to upgrade my coelphysis it cost 0 dd and 181 serum

MY coelphsis is lvl 8

Nope, it’s not a bug. If you want more information about it, you should check the official Dino Storm forum.
Anways, here’s the gist of it, it used to be pay large sum of 8Xk DD first then you can proceed to upgrading dinos. (besides coelo b/c coelo’s the beginner dino). But now, it’s like pay as you level.
Hope this helped. ^^

tnks

I’ve seen something a few days ago…
To me, it look like a random value…
to upgrade my para from lvl 2 to 3, it was 2k DD and 70 serum +10 min
from lvl 3 to 4, It took 3k DD, 100 serum and 18 min
and from lvl 4 to lvl 5, it took 27 serum, 670 DD and 2 minutes
right now to upgrade it to lvl 6, its 5k DD + 181 serum…

now also upgrading a dino from lvl 1 costs a lot…! 2k dd + 70 serum… two days ago upgrading a dino from lvl 1 cost 600 dd + about 20 serum… it isn’t possible…!! bah…