Do a load calc.
Then pull out that over sized 4 ton, and install the correct sized unit.
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How many times must one fix something before it is fixed?
You would do well to install a 2 stage unit there.
But your unit is over-sized or it would not short cycle.
If you installed a dehumidistat to bring the strip heat on (reheat) then the compressor would run longer and bring the humidity down. High humidity is not good for electronic stuff like computers.
A dehumidistat would be a cheap fix up front, but expensive to operate.
Doing what beenthere said would be the best long range solution.
Remember, Air Conditioning begins with AIR.
thanks for your replies, I did end up suggesting to go with electric heat strips. For now I shut off the continues fan.
again thanks Im always trying to learn. Only been if the field for 2 1/2 year.