Matching and Patching Vinyl Sheet Flooring?

Question:After a kitchen remodel we had a few large pieces of vinyl sheet flooring left over. I decided to use these as a new floor for my 11 ft by 8 ft home office. The largest piece covered about 60% of the area but to match the pattern I had to use 3 more pieces cut just right. I tried to match and cut the edges the correct way but my knife had issues slicing through the two layers along the straight edge. I gave up and cut and glued one piece by eye and steady hand. It worked good and you cannot tell that there are 2 pieces. Now I have the other two open seams where the knife did not do me good and I really dont want to glue the edges until I am sure there will be no spaces. Can I patch a strip where it is irregular by removing 2 inches and replacing with an evenly cut piece. What can I use and do I need a seam sealer product?

Thanks in Advance for anything related.

Answers:
Seaming a 2" strip is possible, but not easy. You may choose to use a larger piece if possible even if this means that you won't have an exact pattern match. When cutting seams try cutting each piece individually with a straight edge and brand new utility knife blade instead of cutting both pieces at once.
Seam sealer is a good idea. It serves the purpose of not only holding together the seam, but protecting it from dirt that would otherwise stick to any adhesive residue in the seam. Congoleum seam sealer is widely available and a good product.