Customising toolbars, version X5

[Lenita]

I have customised toolbars in version X5 which also involved creating a third 'line' of tools at the top of the 'page' as well as another small toolbar at the bottom left-hand side (with undo/redo & delete points buttons only).
My problem is that, even though I have 'locked' the toolbars they are 'jumping' to different locations. Eg the third 'line' at the top has now repositioned itself to the left-hand side of the screen. This then leaves no room for the automatic display once I click on an item (eg an object I want to move or copy/paste .... there is insufficient room for these commands to display).
My question is - how can I lock the toolbars into position? I must be missing a step somewhere.
Thanking you in advance,
Lenita