I really appreciate the help! With the advice from jasonharper, I updated to the latest EEGLAB and exported the data again with the “Use comma separator (csv) instead of tab” option checked — the output looks perfect now! like this!

Many thanks also to UncleBigBay for providing valuable suggestions on how to improve my post. Because the Staging Ground post was temporarily locked, I wasn’t able to respond directly, but your support was very helpful.