The side products, I think are unimportant in the question I was asked, but thanks again for the extra explanation. After going back through my notes I did realize that friedel crafts ALKylation can undergo rearrangement whereas ACYLation cant.
I do, however have another question if anyone is around today to answer it:
I know that the butyl group is an ortho/para director that activates the ring, but my question is around whether or not SO3H would actually add to the Para position or the more reactive benzyllic position. I'm leaning towards the benzyllic attack because it doesnt require for the ring's aromaticity to be broken and then rearomatize which would occur if it attacked the para position.
Thanks again.