Any monitoring service I've ever seen is:
You must submit your play on a certain line that is available at the time of submission, and your play is graded on that line.
Same with any number of contests such as wagerline or other.
So if the Jets line moves to 7.5, you'll take that. But if it moved to 6.5, you'd take that?
Much easier would be to say: "I like the Jets at +7 now, but I will wait to see if I can get a better line closer to gameday."
The only thing "confusing" about monitoring is your scheme here.
For anyone else, like OS for example: we know what the line is now, we know if he's getting a line that is available or making something up. And he is graded on the line he took at the time of posting, assuming it was available at the time.
When everyone in the forum grades that way and then you come up with this "alternative plan", I hope you realize everyone will likely not "buy in" to your strategy. If you happen to go 55% while picking games like this, it would likely not impress most here as much as it would if you just posted your play at the time you actually bet the game, and at the line you bet it at.
Again, no problem with saying now that you like the Jets but want a better number. But making your "official" play now, and then grading it on a TBD line in several days is unconventional and causes confusion, despite what you think or believe.