New cattleya shoots no new roots

[tbadams]

Hello I am new to the board and was hoping to get some input.

I recently purchased some large cattleyas from lowes. Upon getting them home i repotted them as they were overwatered. most of the roots had to be removed. Meanwhile 4-6 new shoots are growing on each plant. one plant they are almost 2 inches long and the othe 1 to 11/2 inches long. no new roots are forming like on my other cattleyas.

Is this normal? Should i worry? Is there anything i can do or should do?

They are:
BLC. Burdekin Wonder 'Lake Land'
BLC. Hsinying Flash 'Fire Flame'