I'm having a lot of trouble positioning html elements such as paypal buttons and video players (jwplayer). They look fine in design mode but the exported html is completely unpredictable. Is anybody else experiencing this problem?
I haven't seen this problem personally. there may be some unnecessary positioning code in the HTML/CSS/PHP that is involved with the code that you are trying to paste into Muse.
What would be needed to resolve your issue is the following:
1) a screenshot of your positioning in Muse' Design Mode.
2) a screen shot of the resulting position in Prieview or Publish.
3) the actual HTML code that you are pasting in.