I just did a search on other posts that you'd made to familiarise myself with your level and found these...
Multiple spins, shines, and musicality???
My feet hurt!!!
Have you resolved the feet hurting problem? I assume you have good dance shoes yes?
If you've only been dancing 7 months, even with the private lessons I would doubt you have had the necessary time to practice and hone the technique for 4
clean spins.
According to the spins thread, you weren't using your arms correctly. Have you sorted this? Where are your arms now during the spins?
When you spin on your own at what point do you start to wabble?
If you practice 1 perfect spin, then 2, then 3, then 4, what parts of your body move out of alignment first?
Lead-follow spins are a different dynamic. So even if you can spin 4 times on your own well your following during lead spins may have other issues. Usually in the arm, shoulder or head.
The biggest thing about lead spins is being able to maintain a smooth connection through your arm without moving the position of the halo (hand making a guiding circle around your head) or shoulder out of alignment.
With the leads that you are practicing with are they capable or leading 5 or 6 perfect spins with other followers e.g. instructors? (Once a lead is able to do this there is often no limit to the number of spins he can achieve with a truely good spinner).
On the flip side, there are things an otherwise good lead may do to upset a followers balance during spinning. Instead he should be aiding you in staying stable and in the correct position to enable you to complete more spins than you would otherwise be able to do on your own.