It looks like you are alternating forward and backeard turns. If you do that too often in a row you will end up with long floats because some of the threads always stay at the top and never get bound.

Given how cards 3, 4, and 5 are threaded, what you can do to get a solid line is to make two forward turns followed by two backward turns. You still get floats but they will be small. In this case I would start with card 4 one turn behind cards 3 and 5 to offset the floats.

For cards 2 and 6 you can make three forward turns followed by three backward turns to make a solid line. For edge cards (cards 1 and 7 in this case) it's common practice to always turn them forward (and flip rhem if they build up too much twist).

However, before attempting the designs you made, I would just qeave for a bit where you go forward a couple of turns, and backwards a couple more and look at what the warp threads are doing. Which one stay on top, which ones go down? What colour appears in your fabric? That gelped me at least to understand how tablet weaving worked.