1) Don’t get in a hurry to add another super to your new package colonies – the rule of thumb is to not add another box of new foundation until 7 out of 10 (6 out of 8 if you have 8 frame hives) of the last one are pretty much completely drawn out into comb. If you do they probably won’t work it anyway and they will build up better with less space to heat/cool and defend.
2) If there is any open space in the hive that is where they will build comb instead of on your foundation – bees prefer to draw comb the natural, organic way. They will only draw foundation if there isn’t anywhere else for them to build comb. So, always fill all available space with frames – don’t leave out frames for any reason, and don’t add empty hive bodies to the hive for any reason unless there is some barrier to keep the bees where they belong.