My understanding of the way the rules work is that if your item is deemed votable—I stand to be corrected, by the way, but I believe this is correct—and then the government moves its bill first, yours gets pushed off the agenda because it has been found to be on the same subject matter, and you don't get a chance to submit another item.
An obvious scenario that occurs to me is that the government could, between now and then, simply move the beginning of the debate on its bill. That would be the end of your bill, and you'd have no chance to go back and prepare another item, whereas if your item is deemed non-votable, you do have the chance to prepare another item of private members' business.
Have I understood that correctly? That probably should be directed to Peter rather than to Sheila, but I just wanted to ask if I got it right.