Hey Henry, congrats on the big improvements man, you went to man status in 6 months, that's awesome!
First, no your squat numbers do not necessarily have to be higher because of your deadlift and vice versa. It has a lot to do with body type.
I'll use an example of me and my friend Willie. I have short legs, a long torso, and short arms, I squat 525 and pull 585. Willie has long legs, short torso and long arms, he can squat 550 and pull 725.
So I'd say you simply have an athletic build of long legs and long arms making for a great deadlift, this doesn't make your squat bad, it's good, just your deadlift is really good. I also find the deadlift rises faster than squats in beginners, so your squat probably just needs to catch up a bit.
I really like the manner you train in, it's very balanced, and will go a long way to reinforce great posture. One thing I noticed that you may really like, is that you squat monday, pull tuesday and take wednesday off, then do cleans on friday.... I would switch that to squat monday, tuesday off, deadlift wednesday, press thursday, cleans friday.
The day off on tuesday will just let you be fresher, and shouldn't affect your recovery for the Friday cleans.
As for your question about where to go, I would stay on the current path until progress stops, provided you're using proper form, my one concern about linear progression is you're constantly struggling, instead of having a few days where the weights aren't killing you to work on form.
After this, the program would depend on your goals, for general strength I think 531 is great, for powerlifting the sheiko routines are great. But I would follow a well thought out routine and not just fly by the seat of your pants.
Also, if you get the chance, post some videos of your form dude, can't hurt, and I'd be happy to let you know what you're doing well, and what you can improve on to get better.