Try hide then float.
This what I use:
(defun TBS7-V_16 ()
(setvar "cmdecho" 0)
(command "toolbar" "ALL" "hide")
(command "toolbar" "acad.TB_STANDARD" "float" "100,100" "1")
(command "toolbar" "acad.TB_OBJECT_PROPERTIES" "float" "100,100" "1")
(cond ((= (atoi (substr (getvar "acadver") 1 2)) 16)
(command "toolbar" "acad.TB_LAYER" "float" "100,100" "1")))
(command "toolbar" "acad.TB_REFEDIT" "float" "100,100" "1")
(command "toolbar" "arch.arch_program" "float" "100,100" "1")
(command "toolbar" "arch.arch_sset" "float" "100,100" "1")
(command "toolbar" "arch.arch_plot" "float" "100,100" "1")
(command "toolbar" "arch.arch_draw" "float" "100,100" "1")
(command "toolbar" "arch.arch_layeri" "float" "100,100" "1")
(command "toolbar" "arch.arch_layeriii" "float" "100,100" "1")
(command "toolbar" "arch.arch_layeriv" "float" "100,100" "1")
(command "toolbar" "arch.arch_modifyiii" "float" "100,100" "1")
(command "toolbar" "arch.arch_textii" "float" "100,100" "1")
(command "toolbar" "arch.arch_qlbal" "float" "100,100" "1")
(command "toolbar" "arch.arch_toolpalette" "float" "100,100" "1")
(command "toolbar" "arch.arch_act" "float" "100,100" "1")
(command "toolbar" "acad.TB_STANDARD" "top" "0,0")
(command "toolbar" "acad.TB_REFEDIT" "top" "600,0")
(command "toolbar" "arch.arch_program" "top" "850,0")
(command "toolbar" "arch.arch_modifyiii" "top" "900,0")
(cond ((= (atoi (substr (getvar "acadver") 1 2)) 16)
(command "toolbar" "acad.TB_LAYER" "top" "0,1")))
(command "toolbar" "acad.TB_OBJECT_PROPERTIES" "top" "800,1")
(command "toolbar" "arch.arch_sset" "top" "900,1")
(command "toolbar" "arch.arch_act" "top" "901,1")
(command "toolbar" "arch.arch_layeri" "left" "0,0")
(command "toolbar" "arch.arch_draw" "left" "0,800")
(command "toolbar" "arch.arch_textii" "left" "0,850")
(command "toolbar" "arch.arch_qlbal" "left" "0,875")
(command "toolbar" "arch.arch_toolpalette" "left" "0,900")
(command "toolbar" "arch.arch_layeriii" "top" "900,0")
(command "toolbar" "arch.arch_layeriv" "top" "900,1")
(command "toolbar" "arch.arch_plot" "top" "950,1")
(princ "\n*** Fowler's Standard Toolbar Setup ***")
(princ))