I discovered a strange bug. My site should have 2 forms running in 2 different modules.

But when I click on "continue" in the first form, the second (and not the first!) form continues to its second page.

Does anyone have a solution?

do the forms accidentally have the same name?

no, they have different names. I also thought that this could be the reason.

I forgot to mention: both forms do NOT run in iframes.

yes, thats likely the reason, because the javascripts are only loaded once. in that case you really should use iframes.

if your styles are somehow missing within the iframe then please use the ff_addCustomCSSFile piece as custom piece in the "before form" form piece in your form settings.

see the the piece's description from the manage pieces section (in moste cases its just copy and paste).