Level 2 and 3 Together

Hi. I am currently studying AAT Level 2 with BPP but I find the course very slow (some units have 2 months between the next!) and therefore would like to study Level 3, too.

Does anybody know if this is possible? I would self study this level as I do not like the BPP Online Classroom Live version.

If it wasn't for the synoptic assessment, I wouldn't hesitate to do this but I'm not sure if doing two synoptics in a few months will be okay?

Thanks!