Iphone mail signature problems

Can someone test this and see if they are suffering from it too... I have the same signature on my emails - icloud gmail and hotmail. I sent an email to myself, opened it on my iphone and copied the signature. I have tried to paste it into the iphones signature and while it looks ok there, it is totally wrong in the email itself. The correct signature has things underlined, and is a few lines with spaces between them. When I try paste that and use it on the iphone itself it rearranges all the spaces and such. confusing.