OK, there is more to "torqued" than meets the eye...
You are talking about 90 in/lb of torque. That's 7.5 ft/lbs which is a fairly small amount.
The nut/washer assembly has to seat the bearing. If there's even the slightest burr or nick in the threads on the spindle, the nut might not seat with that small amount of torque. It just won't overcome any imperfections in the thread.
Over the years, this bearing has probably been taken off and on a few times and sometimes not by the best mechanics. Just getting the cotter pin in or out can easily nick the threads, so this isn't uncommon.
So here's what you do... Grab a pair of channel lock type pliers and while spinning the wheel, see if you can turn that nut a little more. I'll bet you can. If it was all torqued correctly and seated, you won't get any movement, it just feels tight. Since it sounds like it's not seated... I'll bet it moves.
In fact, if you pull the hub off, that nut should go on easily without any catches. But often it doesn't due to the threads not being "perfect".
This is a critical part to the car that needs to be done correctly.