Earlier today I tried using 'Column-Matic' code within 'Collapse-O-Matic' code so that when a expand element was clicked, what is displayed is formatted into columns. Let me be the first to advise - DON'T DO IT!!!!! They do not play well together.
I don't know where the fault lies, nor do I care. What does matter is that the combination of the two deleted code, totally screwed up content formatting (both when editing the code and when viewing the content on my WordPress webpage) and costing me roughly three hours fixing everything.
I like and use both Collapse-O-Matic and Column-Matic, and would highly recommend both, BUT NOT TOGETHER!!