first split and new queen

As a first year beekeeper, it's definitely a "learn as you go" experience for me.
The nuc I got this spring has been extremely productive and the queen was certainly doing her job. In less than three months time, I went from having a 5 frame nuc to having 2 full brood boxes and 2 full honey supers - all FULL of bees - every frame! They just really thrived and did fantastic and continue to really bring in nectar and pollen.
That said, about a month into beekeeping, I noticed the girls were getting a little ornery! They often followed me several yards away from their hive and also stung my husband and I when we stood a good distance away to observe, plus they were somewhat pissy with me when I did hive inspections and definitely tried to sting me through my gloves and bee jacket/veil. So I opted to requeen and split the hive. I bought two Caucasian queens, known to be an extra gentle breed, pinched the existing queen (sad! cause she was really a healthy and productive girl) and split the hive, essentially in half - less the forager bees which would all fly back to the original hive.
A mistake I believe I may have made was to not shake the frames of bees into a cardoard box before moving said frames to the new hive - thus letting the foragers fly back into the original hive. Then I could put the 'non flying bees' into the new hive (these are young bees and take care of hive responsibilities - they will not return to the old hive).... It was 90ish degrees and HIGH humidity, and by the time I got the two honey supers off, found the queen and replaced her, and got Hive #1 put back together, sweat was dripping into my eyes and I couldn't see. At this point I just opted to take the two boxes that were full of bees and put them on the bottom board at the new location. Hopefully that doesn't result in robbing, and I will be keeping a close eye on the hive over the next few days.