HTML is tricky
for line break use >br< (reverse the > < symbols)
for double line or paragraph break use >br< >br< (reverse also)
or
>p< (reverse symbols)
Sometimes when you copy/paste an article it just reformats and you have to add the line and paragraph code.
And it always happens when you are in a hurry to get someplace etc.
LOL
It will come, just be patient and practice