So I have a calendar and I made a column, but I didn't give it the right type, so I deleted it and went to make it again, but it won't allow me to create the column again with the same name. So I basically ended up using "ColumnName" instead of "Column Name" everywhere I did this. This strikes me as unprofessional though and I was wondering how I could be able to use the names again?

EDIT: They let you use the name again if you close SP Designer and restart it. Still weird though...