Welcome to the Quilting Board!
No, it is not going to fall apart. There are as many ways to make knots as there are quilters (well not quite). I have made my knots like you do for toomany years to count and nothing has fallen apart.
Jeanne, from the Foothills of NE Oregon
'If you walk on water - you're going to walk all over me"
"Remember that your instincts are more important than rules"
No one has ever become poor by giving. - Anne Frank
Darkness cannot drive out darkness; only light can do that. Hate cannot drive out hate; only love can do that. - Martin Luther King, Jr.