Slurs and ledger line collisions

[k_b]

Is it possible, that your slurs are attached to the wrong voice?
There is a thread, just around two or three days ago on a similar topic: Help with slurs colliding with staccato dots

Fortunately this is easy to fix: select the slurs that are colliding, and in Engrave mode, activate the Avoid collisions property, and activate the checkbox.