I dont think it should be an issue but I could take the 5.1 course and then take the vcp5 exam correct?
I woudlnt see why not, but the 5.1 course isnt listed here
Looking at the courses of previous certification pages, you can see that either edition of the official courses (e.g. 4 as well as 4.1 for VCP4) meets the requirements. I think this web page has just not been updated yet to list the new courses.