Gunter,
Not trying to be an a$$, but check out the contract and read this section: 4.G
I believe your answer is, yes, you get leveling. But since there are other issues at hand (was carryover a reserve or a non reserve trip), I suggest you read the applicable section and see how it pertains to your specific situation. I can't understand half of this document, but this section is pretty easy to understand.
Hope it works out for you and if this doesn't answer your question, provide specifics of your situation and hopefully one of us has experienced this. Cheers