I don't know why but my right lat is sore after delt day?

And am I not doing enough sets or reps? Because my muscles
Rarely get sore. I have to blast out like 2sets of 50reps to get soreness.

My shoulder routine is
Either Smith machine military press
Set 1 135 15-20reps
Set 2 185 8-10reps
Set 3 205 8-10reps
Set 4 225 8-10reps
Set 5 245 8-10reps

Set 6 225 8-10reps
Set 7 185 8-10 reps
Set 8 135 15-20reps

Or

DB press
Set 1 60lbs 10reps
set 2 70 10reps
set 3 80 10 reps
Set 4 90 8-10 reps
Set 5 100lb 8-10

Front raises 35lbs 4sets of 8-10
Side raises 35lbs 4sets of 8-10
Rear flyswatter 30lbs 4 sets 8-10

Wide grip upright rows with 100lb straight bar
3sets of 8-10reps

I switch every week from the DB presses to Smith presses.
and back and forth from DB to cables ever other week.

Note I don't work our like this