Why can't I raise the skill???

Hello everyone, I have what I hope is a simple problem. I have literally dozens and dozens of skill cards but whenever I try to sacrifice one to the other it just goes towards the level increase. For example I have an A+ card lvl 10 w/ IPA (1) i try to sacrifice my lvl 10 card with an A lvl 1 card with IPA but it doesn't pop up with the usualy 7 grand sacrifice charge but like 900 for and it goes towards the stupid lvl. I've wasted probably 3/4 skill cards because of this. What in the world am I doing wrong? Thanks for anyone that can help me!

depend on your luck, that's all
the higher skill, the lower success rate

I'm talking from raising a skill from ipa 1 to a 2. How come sometimes it shows a 7000 and some change sacrifice charge and it works but about 95% of the time it just goes towards a standard lvl increase?

hmmm... I don't really understand what you're saying...

but ~7000 gold is how much it usually costs to sacrifice a single monster to a level 70 monster, so I'm not sure why 7000 is showing up for your A+ level 10... unless you're trying to sacrifice multiple things


To raise skill you need to sacrifice ONE and only ONE monster at a time, if you do more than one, it'll all just go to level

If you're getting 7000 for a level 10, you must be sacrificing level more than one..

but could you clarify your initial question?

like I said, I had trouble understanding what you are saying/asking.

Yup I'm only selecting 1 skill card to sacrifice. Sometimes it will show a 7000 gold sac charge when i raise a skill. But most times it'll say like 900 and that's when i hit cancel cause i know its going towards my lvl not skill lvl. Does that make sense?

hm noooo that's really weird. it doesn't make sense.

that sounds more like a glitch than anything