I tried to explain the spell to you in the
other thread where you also brought up the problem with EE spell. Anyway, playing in the app means you are deprived of huge amount of various information (I know, I play on iPad too). So I’d suggest you to make an experiment:
Setup/requirements:
1) You have (at least) two workshops with the same finished production.
2) You have at least 125% culture bonus - tap on the sun/cloud icon in the top row to check it.
3) And you have at least one culture building polished by another player.
Steps of the experiment:
1) Collect one workshop and note down the amount you get.
2) Cast the EE spell on the already polished culture building.
3) Collect the second workshop and write down the amount.
4) Compare the amount of supplies you got before and after applying the EE spell.
If there is no difference, than it’s really broken in your case and you should contact support. If it differs (hopefully the after amount being higher), than you’ve just gained a little insight into the mechanics.