I have a working folder. I use Commit by right-clicking on it after my work is over and TortoiseSVN commits to a repository in my local computer. I am using Aptana for my development and recently added Subversive plugin. I want to link the same working folder with Subversive. For this I created a new repository in a different folder. Later, I used the Aptana Import option to import my existing working folder into this new repository.
I want to know whether it will work fine or not. I suspect, the revision numbers may get overwritten.
From your description it sounds like you created two different repositories for the same code. This is almost certainly not what you want to do.
A "working copy" in Subversion is attached to exactly one repository. It's not possible (and you wouldn't want to) use the same working copy with more than one repository. This just isn't something that makes sense.
As long as your tools (TortoiseSVN, Subversive) use compatible Subversion working copy formats (same x.y version number), then you should be able to use them with the same working copy and the same repository.