This is an interesting issue. If that is happening then the program you are using is not properly conveying the page breaks to the printer or the printer is misinterpreting the information. Now what program are you using? Also what operating system are you using?
I would start by reinstalling the drives taht are available from the HP website as well :
Let me know how that goes and I will get right back with you!
I hope you are having a wonderful week, and I hope that the weather where you are located is as beautiful there as it is here!
-Spencer